SUMMARY

My contact with mathematics beyond the normal school level began with mathematical Olympiads. It grew quickly into a fascination with the subject, and, by the age of 15, I was determined to try and become a university teacher. In secondary school I won several provincial and state Olympiads, participated in one International Mathematical Olympiad, won numerous school prizes and completed two final years in one. Next, I completed a four year undergraduate course at the University of Novi Sad in less than three years, scoring maximal possible marks in all but three of the exams, and obtaining prizes in each year. During my Ph.D. studies at the University of St Andrews, in which I studied semigroup presentations, I published more than ten papers, gave several talks at various seminars and conferences, and completed the degree in two and a half years. I have subsequently held a number of temporary and permanent positions in the School of Mathematics and Statistics. Currently I am Professor of Mathematics and Head of School. I have continued working on semigroup presentations, and also extended my interests into a number of related areas such as automatic structures, combinatorics of permutations and general/universal algebra. I have written over 100 publications, most in leading international journals, delivered over 50 invited lectures, collaborated with over 40 mathematicians, supervised 28 Ph.D. students and won several research grants. My lecture courses are very popular with students, three of whom won prizes for their projects, and many of whom continue with postgraduate studies.

CONTENTS

GENERAL DATA

Surname: Ruskuc.

First name: Nikola (Nik).

Date of birth: 14 August, 1968.

Place of birth: Novi Sad, Serbia.

Citizenship: U.K. and Serbia.

Family: married to Ester Ruskuc; children: Andrei (16), Emma (14).

Home address: 1 Moir Crescent, St Andrews, Fife, KY16 8XN, Scotland, U.K.

Occupation: Professor of Mathematics and Head of School of Mathematics and Statistics, University of St Andrews.

Office address: School of Mathematics and Statistics, University of St Andrews, St Andrews KY16 9SS, Scotland, UK; phone 01334 463787; fax 01334 463748; email nik@mcs.st-and.ac.uk; URL http://www-groups.st-and.ac.uk/~nik/.

Professional Qualifications:

• B.Sc. University of Novi Sad, Novi Sad, Serbia, 1990;
• Ph.D. University of St Andrews, St Andrews, Scotland, 1995.

Languages: English, Serbian, Russian.

Other interests: literature, philosophy, music, theatre, art, travelling.

SCHOOL EDUCATION

Schools attended:

• Primary School Zarko Zrenjanin, Novi Sad, 1975-1983;
• Secondary Medical School, Novi Sad, 1983-1985;
• School of Mathematics and Science Jovan Jovanovic Zmaj, Novi Sad, 1985/86 (two years completed in one year).

Awards:

• award Vukova Diploma for the overall performance in secondary school;
• three awards Mika Petrovic Alas for the performance in Mathematics;
• school prize for the best mathematician in 1985/86.

Mathematical Olympiads:

• four times winner in the Regional (Vojvodina) Olympiad (1983-86);
• twice winner and twice the runner-up in the Yugoslavian Olympiad (1983-86);
• participant in the International Mathematical Olympiad in Warszaw, Poland (1986).

UNDERGRADUATE STUDIES

University: University of Novi Sad, Novi Sad, Serbia.

Duration: From June 1986 to May 1990, with a one year break in 1987/88 for National Service (a four year degree finished in less than three years).

Contents of the degree: Courses in all major branches of mathematics; courses in physics, computer science, economics and sociology; a total of 31 courses.

Average marks in different years (scale: 5-10): 10.00 (1st year), 9.85 (2nd year), 10.00 (3rd year), 9.57 (4th year).

Total average mark (scale: 5-10): 9.87.

Awards:

• three First Rank departmental prizes for the performance in the 1st, 2nd and 3rd years;
• three First Rank university prizes for the performance in the 1st, 2nd and 3rd years;
• First Rank departmental prize for the overall performance;
• First Rank university prize for the overall performance.

POSTGRADUATE STUDIES

University: University of St Andrews, St Andrews, Scotland.

Duration: from October 1992 to April 1995.

Scholarships: University of St Andrews Scholarship and Overseas Research Student Award Scheme (ORS).

Subject: Algebra.

Supervisors: Professors J.M. Howie and E.F. Robertson.

Research: presentations of semigroups, connections between group presentations and semigroup presentations, computational methods for finitely presented semigroups, simple semigroups, matrix semigroups, varieties of semigroups.

Thesis: Semigroup Presentations, St Andrews, 1995.

Viva: April 1995.

Examiners: Dr C.M. Campbell (St Andrews), Dr P.M. Neumann (Oxford).

Graduation: July 1995.

EMPLOYMENT HISTORY

1990-1991: Teaching Assistant, University of Novi Sad.

1992-1995: Undergraduate Tutor (part-time), University of St Andrews.

1995-1996: Teaching and Research Fellow, University of St Andrews.

1996-1997: Research Assistant, University of St Andrews.

1997-2000: Lecturer in Pure Mathematics, University of St Andrews.

2000-2004: Reader in Pure Mathematics, University of St Andrews.

2004-present: Professor of Mathematics, University of St Andrews.

2010-present: Head of School.

Research Leave: 2004/05.

TEACHING

Subjects lectured: SMSTC Algebra (Groups) (2007-2009) First Year Mathematics (2005-2007), First Year Pure and Applied Mathematics (1999-2003), Second Year Algebra and Analysis (yearly 1999-2000, 2003, 2008, 2009), Second Year Discrete Mathematics (yearly 2002-2004), Fundamentals of Pure Mathematics (2005-2008, 2012), Finite Mathematics (bi-yearly 1996-2002), Groups (yearly 1995-1998, 2006-2010), Semigroups (bi-yearly 1999-2003, 2012), Semigroups (M.Sc.) (2001, 2003), Symbolic Computation (1995), Supervision of 40+ undergraduate projects.

Course development:

• SMSTC - Scottish Mathematical Sciences Training Centre, joint development of the Groups part of the Algebra Stream.
• 2005: Development of curriculum and course materials for a level 3 module Fundamentals of Pure Mathematics.
• 2002-2003 : A leading role in a radical overhaul of the School's degree structure. This includes replacing the M.Sci. degree with a more distinctive M.Math. degree, creation of a whole series of new courses (one on Level 3 and six on Level 5 in Pure Mathematics), the design of new degree pathways, and specification of degree requirements.
• 2001-2002: Leadership in re-engineering the second year Discrete Mathematics Course, to bring it more in line with the contemporary computational trends.
• 1995- : Re-designing each of the courses I lectured, and production of high quality lecture notes, tutorial sheets, solutions, advanced problem sheets, computer practicals, and miscellaneous reading materials; currently taught ones can be inspected at
  xlinkwww-groups.mcs.st-and.ac.uk/~nik/Courses/http://www-groups.mcs.st-and.ac.uk/~nik/Courses/.
• 1997: Part of a team revising the provision and structure of Pure Mathematics at honours level.

M.Sc. Supervision:

• C. Carvalho (coursework and dissertation), 2003;
• R. Brignall (coursework and dissertation), 2003/04;
• S. Inch (coursework), 2006/07.
• A. Bergabo (dissertation), 2012.

Other teaching: supervising honours students in summer vacation programmes (1994-2006); supervising individual preparations for mathematical olympiads of talented pupils, and teaching to larger classes of interested pupils in local schools.

Professional training: Induction course for new teaching staff, Dundee, 1995.

Membership in the professional institutions: Higher Education Academy (formerly Institute for Learning and Teaching in Higher Education), Edinburgh Mathematical Society, London Mathematical Society.

Grants: Teaching with GAP, SALTIRE, University of St Andrews, 2002, £2000.

Achievements: very high approval ratings by the students; four project students won departmental prizes for best projects; a significant number of students continuing with post-graduate studies in group theory, semigroup theory, combinatorics and related areas, both in St Andrews (see below) and elsewhere (6).

ACADEMIC SERVICE

Duties:

• Head of School (2010-)
• Deputy Head of School (2008-2010);
• Head of the Algebra stream in SMSTC (2008);
• co-ordinator of the Pure Mathematics submission for the 2007 RAE;
• Head of the Pure Mathematics Division (2001-04, 2007-2010);
• member of the School Management Group (2001-04, 2007-);
• Head of the Algebra research group (1997-2008);
• postgraduate recruitment officer for Algebra and Pure Mathematics (1997-2004);
• organiser of the `Combinatorial Algebra Seminar' (1997-2004);
• member of the Research Committee (2005-);
• member of the Postgraduate Committee (1998-2001);
• member of the Staff-Student Council (1997-2001).

External Appointments/Service:

• External Assessor, undergraduate programmes, Essex University, 2005.
• External Assessor, postgraduate taught programmes, Essex University, 2006.
• External Examiner, Essex University 2005-2009.
• External Assessor, University of Glasgow, 2009.
• EPSRC prioritisation panel: December 2008, March 2009, March 2012, July 2012 (chair, incl. fellowships), March 2013 (Programme Grants).
• External Assessor, University of Edinburgh, 2010.
• External Assessor, Heriot Watt University, February 2011.

Conference Organisation:

• (with J.M. Howie) Semigroups and Applications, St Andrews, July 1997;
• (with N.D. Gilbert and I. Gordon) Scottish Algebra Day, Edinburgh, May 2003.
• (with J.M. Howie) Combinatorial and Computational Group Theory (in honour of E F Robertson's 60th birthday), St Andrews, May 2003.
• (with J.D. Mitchell), Computational and Algorithmic Aspects of Semigroup Theory, St Andrews, September 2006.
• (with S.A. Linton and V. Vatter) Permutation Patterns, St Andrews, June 2007.

Professional training:

• Recruitment and selection procedures, St Andrews, December 2003.
• Leadership Foundation course for Heads of Schools, 2010.

Achievements: The Algebra Research Group is one of the largest and most dynamic algebra groups in the UK. It has had outstanding success in producing high quality publications, recruiting postgraduate students (13 in 2003/04, against a declining national trend), attracting external funding and collaborations. Pure Mathematics Division received a Grade 5 in the 2001 RAE; it has also made significant progress in attracting students into the courses for which it is responsible, and changing the students' perception of the subject matter as being hard and technical. These, of course, are achievements of all the staff involved, and I do not claim any special credit, except, perhaps, for consciously encouraging the development of a dynamic, enthusiastic and friendly environment. I do, however, believe that my efficient and purposeful handling of administration has contributed to the success of all the above bodies.

RESEARCH

Statement: My research covers a wide area within the fields of Algebra, Discrete Mathematics and Theoretical Computer Science. In my opinion these fields have played a crucial role in the 20th century Mathematics: they have provided an umbrella for the fundamental results on incompleteness and undecidability, and, at the same time, the necessary language and methodology for the emerging computer technology. Spanning these there is a vast area scattered with gems of knowledge. I see my research work as looking, together with my collaborators and students, for these gems, discovering and classifying them. And, while searching, we are constantly developing and re-inventing the underlying mathematical language.

Research interests: semigroup presentations; combinatorics on permutations and words; group presentations; transformation semigroups; algorithmic and computational methods in algebra; automatic structures; formal languages and automata; universal algebra.

Collaborators (excluding research students during their studies): M.H. Albert (Dunedin, New Zealand), I. Araujo, M.D. Atkinson (Dunedin, New Zealand), H. Ayik (Adana, Turkey), M. Bouvel (Bordeaux), M.J.J. Branco (Lisbon, Portugal), R. Brignall (Open University), A.J. Cain (Porto), C.M. Campbell (St Andrews), C. Carvalho (Herefordshire), S. Crvenkovic (Novi Sad, Serbia), L. Descalco (Aveiro, Portugal), I. Dolinka (Novi Sad, Serbia), E. Dombi (Strathclyde), A.J. Duncan (Newcastle), V.H. Fernandes (Lisbon, Portugal), N.D. Gilbert (Heriot Watt, Edinburgh), G.M.S. Gomes (Lisobon, Portugal), R. Gray (Lisbon), P.Z. Hermann (Budapest, Hungary), P.M. Higgins (Colchester), M. Hoffmann (Leicester), J.M. Howie (St Andrews), S. Huczynska (St Andrews), S.A. Linton (St Andrews), N.J. Loughlin (Newcastle), V. Maltcev (Kiev), P. Mayr (Linz), J.D. Mitchell (St Andrews), M. Morayne (Wroclaw, Poland), M. Neunhöffer (St Andrews), G. Oliver, F. Otto (Kassel, Germany), G. Pfeiffer (Galway, Ireland), M. Quick (St Andrews), E.F. Robertson (St Andrews), R. Smith (SUNY Brockport), R.M. Thomas (Leicester), Y. Unlu (Adana, Turkey), V. Vatter (Florida, Gainesville), A.R.Wallis (Heriot Watt), J. West (Bristol), J. Wiegold (Cardiff).

Supervision of Ph.D. students:

• (unofficial) Mohammed Ibrahim, 1994-1997, thesis Semigroup Presentations;
• (unofficial) Hayrullah Ayik, 1995-1998, thesis Presentations and Efficiency of Semigroups;
• M. Robert Thomson, 1997-2001, thesis Finiteness Conditions of Semigroups and Related Properties of Diagonal Acts;
• Isabel M. Araujo, 1998-2001, thesis Presentations for Semigroup Constructions and Related Computational Methods;
• Luis Descalco, 1999-2002, thesis Automatic Semigroups: Constructions and Subsemigroups;
• James D. Mitchell, 1999-2002, thesis Extremal Problems in Combinatorial Semigroup Theory;
• Maximillian M. Murphy, 1999-2003, thesis Restricted Permutations, Antichains, Atomic Classes and Stack Sorting;
• Erzsebet R. Dombi, 2001-2004, thesis Automatic S-acts and Inverse Semigroup Presentations;
• Nelson Silva, 2001-2006, thesis Computing with Permutations and Transformations;
• Peter Gallagher, 2002-2005, thesis On the Finite Generation and Presentability of Diagonal Acts, Finitary Power Semigroups and Schutzenberger Products;
• Robert Gray, 2002-2005, thesis A Graph Theoretic Approach to Combinatorial Problems in Semigroup Theory;
• Alan Cain, 2002-2005, thesis Presentations for Subsemigroups of Groups;
• Catarina Carvalho, 2002-2005, thesis Generation and Presentations of Semigroup Constructions: Bruck-Reilly Extensions and P-semigroups;
• Steve Waton, 2003-2007, thesis On Permutation Classes Defined by Token Passing Networks, Gridding Matrices and Pictures: Three Flavours of Involvement;
• Robert Brignall, 2004-2007, thesis Simplicity in Relational Structures and its Application to Permutation Classes;
• Fiona Brunk, 2005-2009, thesis Intersection Problems in Combinatorics;
• Andreas Diestler, 2006-2010, thesis Classification and Enumeration of Finite Semigroups;
• Victor Maltcev, 2006-2012, thesis Topics in Combinatorial Semigroup Theory;
• Nabilah Abu-Ghazalh, 2009-2013, thesis Finiteness Conditions for Unions of Semigroups;
• Simon Craik, 2008-;
• Markus Pfeiffer, 2008-;
• Arthur Geddes, 2008-;
• Jennifer Awang, 2010-;
• Alex McLeman, 2010-;
• James Hyde, 2010-;
• Samuel Baynes, 2010-;
• Rachael Carey, 2011-;
• Ruth Hoffmann, 2011-.

Ph.D. Examining:

• A. Cutting, University of St Andrews, December 2000.
• M.E. Kambites, University of York, August 2003.
• E. Kimber, University of St Andrews, February 2006.
• J. East, University of Sydney, Spring 2006.
• G. Oliver, University of Leciester, November 2006.
• S.C. Lovell, University of Leeds, December 2006.
• C. Hollings, University of York, September 2007.
• Elizabeth Miller, Heriot-Watt, February 2009.
• Yann Peresse, University of St Andrews, September 2009.
• F. Soares de Almeida, Lisbon, December 2010.
• J.D. McPhee, University of St Andrews, September 2012.

Research grants:

• Presentations for substructures of algebraic structures, The Nuffield Foundation SCI/180/97/54/G, July 1998, £4000.
• Combinatorial and geometric theory of groups and semigroups and its applications to computer science, INTAS, June 2000, Euros 3000.
• International Short Visits Scheme, London Mathematical Society, June 2001, £1900.
• Pattern classes of permutations (PI), EPSRC GR/S41074/01, September 2003, £5433.
• Applications of automata and languages in the theory of pattern classes of permutations (PI), EPSRC GR/S53503/01, January 2004, £157723.
• Semigroups and monoids in GAP (PI), EPSRC GR/S56085/01, January 2004, £144327.
• Multidisciplinary Critical Mass in Computational Algebra and its Applications (coI), EPSRC EP/C523229/1, September 2005, £1098897.
• Automata, Languages, Decidability in Algebra (PI), EPSRC EP/H011978/1, current, £350974.
• Representation Theory of Semigroups (PI), EPSRC EP/I032282/1, current, £97569.
• The Structure of Permutation Classes (PI), EPSRC EP/J006440/1, current, £66715.

Research visits:

• Budapest, Miskolc, Szeged (Hungary), March 1996;
• Lisbon (Portugal), November 1997, May-June 1999, March, June, December 2010; May, July 2012.
• Milan, Florence (Italy), November 1998.
• Dunedin (New Zealand), October-November 2000, November 2001, January-February 2004, January-February 2005, December 2007, January 2010, January 2012.
• Leicester, February 2001.
• Evora (Portugal), July 2001.
• Gainesville, Florida, USA, November 2011.
• Open University, October 2012.
• York, January 2013.
• Linz, Austria, March 2013.

Membership in the professional institutions: Edinburgh Mathematical Society, London Mathematical Society, EPSRC Peer Review College.

Professional training:

• Managing Research Assistants, Strathclyde University, Glasgow 1999.
• Managing Your Research Students, University of St Andrews, St Andrews, May 2001.
• EPSRC College Launch Day, Edinburgh, March 2003.

INVITED LECTURES

Invited lectures:

• Generators and relations for some common semigroups, University of St Andrews Colloquium, St Andrews, Scotland, U.K., December 1993.
• Investigating the structure of a finitely presented semigroup, University of Glasgow, Glasgow, Scotland, February 1994.
• Investigating the structure of a finitely presented semigroup, Edinburgh University, Edinburgh, Scotland, February 1994.
• Groups and semigroups in St Andrews, RWTH, Aachen, Germany, September 1994.
• Semigroup and group presentations--computational aspects, University College, Galway, Ireland, February 1995.
• Are semigroups semi-groups? (Combinatorial examples), Mathematical Institute of the Hungarian Academy of Science, Budapest, Hungary, March 1996.
• Subsemigroups of free semigroups, University of Miskolc, Miskolc, Hungary, March 1996.
• Subsemigroups of finitely presented semigroups, University of Szeged, Szeged, Hungary 1996.
• Presentations for simple semigroups, Workshop on Theory of Semigroups, Lisbon, Portugal, May 1996. Slides.
• When is the direct product of two semigroups finitely presented?, University of St Andrews, St Andrews, Scotland, U.K., December 1996.
• Groups, semigroups and presentations, Groups Bath-St Andrews 1997, Bath, England, August 1997. Slides.
• Computational semigroup theory and GAP, with G. Pfeiffer, a series of 12 lectures and practical sessions, Lisbon, Portugal, November 1997. Slides 1. Slides 2. Slides 3.
• Generators and relations for direct products of semigroups, York, England, December 1997. Slides.
• On index and combinatorial finiteness conditions for semigroups, Edinburgh, Scotland, January 1998. Slides.
• On index and combinatorial finiteness conditions for semigroups, QMW, London, England, February 1998. Slides.
• Index for subsemigroups: combinatorial and computational issues, Leicester, England, March 1998. Slides.
• Schützenberger groups, International Conference on Algorithmic Problems in Groups and Semigroups, Lincoln, Nebraska, U.S.A., May 1998. Slides.
• Finite presentability of direct products of semigroups, CGAMA, Edinburgh, Scotland, July 1998. Slides.
• Presentations for semigroups and groups related to them, Bath, England, October 1998. Slides.
• Presentations for semigroups and groups related to them, Glasgow, Scotland, October 1998. Slides.
• Presentations for semigroups and groups related to them, Florence, Italy, November 1998.
• Combinatorial semigroup theory: results and problems, University of London Algebra Seminar, Imperial College, London, England, February 1999. Slides.
• Semigroup presentations, Newcastle, England, March 1999. Slides.
• Computational tools in semigroup theory and their application to semigroup presentations, a series of 10 lectures, Lisbon, Portugal, May 1999.
• On minimal presentations for groups, semigroups and monoids, Leicester, England, February 2001. Slides.
• Combinatorial properties of wreath products and diagonal acts, Thematic Term on Semigroups, Algorithms, Automata and Languages, Coimbra, Portugal, July 2001. Slides.
• On the Berman Conjecture on p_n-sequences of Finite Semigroups, International Workshop on Semigroups, Automata, and Formal Languages, Crema, Italy, June, 2002. Slides.
• Subsemigroups of the Bicyclic Monoid, Joint AMS-UMI Meeting, Pisa, Italy, June 2002. Slides: Slides. Figure 1. Slides.talks/pisafig2.pdf
• Relative ranks in infinite transformation semigroups, Glasgow, Scotland, October 2002. Slides.
• Generators and Defining Relations for Unions of Semigroups, International Workshop on Semigroups and Languages, Lisbon, Portugal, November 2002. Slides.
• Generators and Presentations for Wreath Products and Diagonal Acts of Semigroups, University of Edinburgh and Heriot Watt Algebra Seminar, Edinburgh, April 2003. Slides.
• Pattern Avoidance in Permutations, Cambridge University, May 2003. Slides.
• Generators and Defining Relations for Direct Products of Semigroups, NSAC2003, Novi Sad, Serbia, August 2003. Slides.
• Decidability Questions for Pattern Avoidance Classes of Permutations, Cambridge, October 2004. Slides.
• Decidability Questions for Pattern Avoidance Classes of Permutations, Australasian Computer Science Week, CATS 2005, Newcastle, NSW, February 2005. Slides.
• Presentations for (Sub)semigroups, International Algebraic Conference, Ekaterinburg, Russia, September 2005. Slides.
• Presentations of (Sub)semigroups, Pure Mathematics Colloquium, Leeds, March 2006. Slides.
• Presentations for Bruck-Reilly Extensions and Groups of Units, Semigroups, Categories and Automata (Fountainfest), York, October 2006. Slides.
• Endomorphism Monoids of Graphs and Partial Orders, Combinatorics of Arc-Transitive Graphs and Partial Orders, Leeds, August 2007. Slides.
• Endomorphism Monoids of Combinatorial Structures, 32nd Australasian Conference on Combinatorial Mathematics & Combinatorial Computing, Dunedin, New Zealand, December 2007. Slides. Printable version.
• Some interesting properties of direct products of groups, semigroups and other algebraic structures, Maximals, Edinburgh, February 2008. Slides. Printable version.
• Diagonal Acts and Applications, BMC, York, March 2008. Slides. Printable version.
• Monoids and Their Cayley Graphs, Northern British Geometric Group Theory Network, Leeds, April 2008. Slides. Printable version.
• Some Combinatorial Properties of Direct Products of Groups, Semigroups and Other Algebraic Structures, Groups Galway 2008, Galway, May 2008. Slides. Printable version.
• Residual Finiteness of Monoids, Associated Actions and Groups, SAGE, University of Essex, August 2008. Slides. Printable version.
• Some Combinatorial Properties of Direct Products of Groups, Semigroups and Other Algebraic Structures, York, November 2008. Slides. Printable version.
• Residual Finiteness of Monoids, Associated Actions and Groups, Newcastle, November 2008. Slides. Printable version.
• One Relation Semigroups, NBSAN, York, January 2009. Slides. Printable version.
• Growth of Generating Sets of Direct Powers, ICGS2009, Lincoln, Nebraska, May 2009. Slides. Printable version.
• Rewriting Generators for (Sub)Semigroups, International Conference on Semigroups and Related Topics, Porto, Portugal, July 2009. Slides. Printable version.
• Growth of Generating Sets of Direct Powers, Glasgow, 30 September 2009. Slides. Printable version.
• Growth of Generating Sets of Direct Powers, Lisbon, 26 March 2010.
• Substitution decompositions and pattern classes of permutations, NORCOM2010, Reykjavik, 26 May 2010. Slides.
• Grid Pattern Classes, Permutation Patterns 2010, Dartmouth College, 11 August 2010. Slides.
• Grid Pattern Classes, DIMAP Seminar, Warwick, 16 November 2010. Slides.
• 1+1=2: applications to direct products of semigroups, Lisbon, 16 December 2010. Slides.
• Generating Direct Powers, University of Florida, Gainesville, Florida, 21 November 2011.
• Generating Direct Powers, AAA83, Novi Sad, Serbia, 16 March 2012. Slides.
• Permutations and Words, Open University, 15 May 2012. Slides.
• Ranks of Semigroups, Workshop on Semigroups (To remember John M. Howie on the occasion of his 76th birthday), Lisbon, 24 May 2012. Slides.
• Free idempotent generated semigroups, Semigroups and Applications, Uppsala, 1 September 2012. Slides.
• Hopfian property for semigroups, York, 23 January 2013. Slides.
• Permutations and Words, Strathclyde, Glasgow, 15 February 2013. Slides.
• 1+1=2 makes direct products interesting, Linz, Austria, 26 March 2013. Slides.

Other conference talks:

• p_n-sequences of semigroups, Summer School in Algebra and Ordered Sets, Kuncice pod Ondreinikem, Czechoslovakia, September 1991;
• Semigroup and group presentations, British Mathematical Colloquium, Cardiff, Wales, March 1994;
• Constructions and presentations for semigroups, Conference on Semigroups, Automata and Languages, Porto, Portugal, Jun 1994;
• Searching for index, Semigroups and Their Applications, Prague, Czech Republic, July 1996;
• Computing in transformation semigroups, GAP Workshop, Aachen, Germany, September 1996.
• Some (easy?) questions concerning semigroup presentations, Third International Colloquium on Words, Languages and Combinatorics, Kyoto, Japan, March 2000;
• Automatic semigroups, Workshop on Algebraic Systems, Formal Languages and Computations, Kyoto, Japan, March 2000;
• Todd-Coxeter type methods for finitely presented inverse semigroups, International Conference on Geometrical and Combinatorial Methods in Group Theory and Semigroup Theory, Lincoln, Nebraska, U.S.A., May 2000;
• Decidability Questions for Pattern Avoidance Classes of Permutations, International Conference on Permutation Patterns, Gainesville, Florida, U.S.A., March 2005.

PUBLICATIONS

1. S. Crvenkovic, N. Ruskuc, On semigroups having n² essentially n-ary polynomials, Algebra Universalis 30(1993), 269-271.
2. S. Crvenkovic, N. Ruskuc, On groupoids having n² essentially n-ary polynomials, Review of Research, Faculty of Science, Math. Ser. 23, 1(1993), 287-312.
3. N. Ruskuc, On the rank of completely 0-simple semigroups, Math. Proc. Cambridge Philos. Soc. 116(1994), 325-338.
4. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Fibonacci semigroups, J. Pure Appl. Algebra 94(1994), 49-57.
5. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Semigroup presentations and minimal ideals, in `The Proceedings of the ICMS Workshop on Geometric and Combinatorial Methods in Group Theory', A.J. Duncan et al. (eds.), Cambridge University Press, 1994, 29-42.
6. J.M. Howie, N. Ruskuc, Constructions and presentations for monoids, Comm. Algebra 22(1994), 6209-6224.
7. N. Ruskuc, Matrix semigroups- generators and relations, Semigroup Forum 51(1995), 319-333.
8. N. Ruskuc, Semigroup Presentations (Ph.D. Thesis, University of St Andrews, 1995). Electronic copy..
9. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Semigroup and group presentations, Bull. London Math. Soc. 27(1995), 46-50.
10. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Rewriting a semigroup presentation, Internat. J. Algebra Comput. 5(1995), 81-103.
11. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Reidemeister-Schreier type rewriting for semigroups, Semigroup Forum 51(1995), 47-62.
12. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, On semigroups defined by Coxeter type presentations, Proc. Royal Soc. Edinburgh, 125(1995), 1063-1075.
13. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Y. Unlu, Certain one-relator products of semigroups, Comm. Algebra 23(1995), 5207-5219.
14. S. Crvenkovic, N. Ruskuc, Log-linear varieties of semigroups, Algebra Universalis 33(1995), 370-374.
15. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Subsemigroups of finitely presented semigroups, J. Algebra 180(1996), 1-21.
16. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, On subsemigroups and ideals in free products of semigroups, Internat. J. Algebra Comput. 6 (1996), 571-591.
17. S.A. Linton, G. Pfeiffer, E. F. Robertson, N. Ruskuc, Monoid, GAP refereed share package 22 (1997).
18. N. Ruskuc, On large subsemigroups and finiteness conditions of semigroups, Proc. London Math. Soc. 76 (1998), 383-405.
19. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Presentations for subsemigroups--applications to ideals of semigroups, J. Pure Appl. Algebra 124 (1998), 47-64.
20. P.M. Higgins, J.M. Howie, N. Ruskuc, On relative ranks of full transformation semigroups, Comm. Algebra 26 (1998), 733-748.
21. P.M. Higgins, J.M. Howie, N. Ruskuc, Generators and factorizations of transformation semigroups, Proc. Roy. Soc. Edinburgh. 128 (1998), 1355-1369.
22. J.M. Howie, N. Ruskuc, `Semigroups and Applications' (Proceedings), World Scientific, Singapore, 1998.
23. S.A. Linton, G. Pfeiffer, E.F. Robertson, N. Ruskuc, Groups and actions in transformation semigroups, Math. Z. 228 (1998), 435-450.
24. E.F. Robertson, N. Ruskuc, J. Wiegold, Generators and relations of direct products of semigroups, Trans. Amer. Math. Soc. 350 (1998), 2665-2685.
25. N. Ruskuc, R.M. Thomas, Syntactic and Rees indices of subsemigroups, J. Algebra 205 (1998), 435-450.
26. N. Ruskuc, A note on maximal group homomorphic images of completely simple semigroups, Semigroup Forum 58 (1999), 466-467.
27. N. Ruskuc, Presentations for subgroups of monoids, J. Algebra 220 (1999), 365-380.
28. H. Ayik, N. Ruskuc, Generators and relations of Rees matrix semigroups, Proc. Edinburgh Math. Soc. 42 (1999), 481-495.
29. C.M. Campbell, E.F. Robertson, N. Ruskuc, G.C. Smith, `Groups St Andrews 1997 in Bath' (Proceedings, 2 Volumes), Cambridge University Press, Cambridge, 1999.
30. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Groups, semigroups and finite presentations, in `Geometric Group Theory Down Under', J. Cossey et al. (eds.), Walter de Gruyter, Berlin, 1999, 55-69.
31. A.J. Duncan, E.F. Robertson, N. Ruskuc, Automatic monoids and change of generators, Math. Proc. Cambridge Philos. Soc., 127 (1999), 403-409.
32. P.Z. Hermann, E.F. Robertson, N. Ruskuc, On products of all elements of a finite semigroup, Proc. Edinburgh Math. Soc. 42 (1999), 551-557.
33. N. Ruskuc, On finite presentability of monoids and their Schutzenberger groups, Pacific J. Math. 195 (2000), 487-509.
34. N. Ruskuc, Presentations for monoids, their maximal subgroups, and Schutzenberger groups, in `Algorithmic Problems in Groups and Semigroups', J.-C. Birget et al. (eds.), Birkhauser, Boston, 2000, 235-249.
35. I.M. Araujo, N. Ruskuc, On finite presentability of direct products of semigroups, Algebra Colloq. 7 (2000), 83-91.
36. R.E. Arthur, N. Ruskuc, Presentations for two extensions of the monoid of order-preserving mappings on a finite chain, Southeast Asian Bull. Math. 24 (2000), 1-7.
37. H. Ayik, C.M. Campbell, J.J. O'Connor, N. Ruskuc, Minimal presentations and efficiency of semigroups, Semigroup Forum 60 (2000), 231-242.
38. H. Ayik, C.M. Campbell, J.J. O'Connor, N. Ruskuc, On the efficiency of finite simple semigroups, Turkish J. Math 24 (2000), 129-146.
39. H. Ayik, C.M. Campbell, J.J. O'Connor, N. Ruskuc, On the efficiency of wreath products of groups, in `Groups Korea 98', Y.C. Baik et al. (eds.), Walter de Gruyter, Berlin, 2000, 39-51.
40. H. Ayik, C.M. Campbell, J.J. O'Connor, N. Ruskuc, The semigroup efficiency of direct powers of groups, in `Proceedings of the International Conference on Semigroups, Braga, Portugal', P. Smith et al. (eds.), World Scientific, Singapore, 2000, 19-25.
41. H. Ayik, C.M. Campbell, J.J. O'Connor, N. Ruskuc, The semigroup efficiency of groups and monoids, Math. Proc. Roy. Irish Acad. Sect. A, 100 (2000), 171-176.
42. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Direct products of automatic semigroups, J. Austral. Math. Soc. 69 (2000), 19-24.
43. S. Crvenkovic, I. Dolinka, N. Ruskuc, Notes on the number of operations of finite semigroups, Acta Sci. Math. (Szeged) 66 (2000), 23-31.
44. I.M. Araujo, N. Ruskuc, Finite presentability of Bruck-Reilly extensions of groups, J. Algebra 242 (2001), 20-30. DOI: 10.1006/jabr.2001.8810 .
45. I.M. Araujo, M.J.J. Branco, V.H. Fernandes and G.M.S. Gomes, N. Ruskuc, On generators and relations for unions of semigroups, Semigroup Forum 63 (2001), 49-62.
46. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Automatic semigroups, Theoret. Comput. Sci. 250 (2001), 365-91. DOI: 10.1016/S0304-3975(99)00151-6.
47. S. Crvenkovic, I. Dolinka, N. Ruskuc, Finite semigroups with few term operations, J. Pure Appl. Algebra 157 (2001), 205-214. DOI: 10.1016/S0022-4049(00)00017-7.
48. S. Crvenkovic, I. Dolinka, N. Ruskuc, The Berman conjecture is true for finite surjective semigroups and their inflations, Semigroup Forum 62 (2001), 103-114. DOI: 10.1007/s002330010010.
49. F. Otto, N. Ruskuc, Confluent monadic string-rewriting systems and automatic structures, J. Autom. Lang. Comb. 6 (2001), 375-388.
50. E.F. Robertson, N. Ruskuc, M.R. Thomson, On diagonal acts of monoids, Bull. Austral. Math. Soc. 63 (2001), 167-175. DOI: 10.1017/S0004972700019225.
51. M.D. Atkinson, M.M. Murphy, N. Ruskuc, Partially well-ordered closed sets of permutations, Order 19 (2002), 101-113. DOI: 10.1023/A:1016500300436. arXiv:math/0310321.
52. M.D. Atkinson, M.M. Murphy, N. Ruskuc, Sorting with two ordered stacks in series, Theoret. Comput. Sci. 289 (2002), 205-223. DOI: 10.1016/S0304-3975(01)00270-5.
53. C.M. Campbell, J.D. Mitchell, N. Ruskuc, On defining groups efficiently without using inverses, Math. Proc. Cambridge Philos. Soc. 133 (2002), 31-36. DOI: 10.1017/S0305004102005959. Offprint.
54. C.M. Campbell, J.D. Mitchell, N. Ruskuc, On the efficiency and deficiency of Rees matrix semigroups, in Semigroups, Algorithms, Automata and Languages (Coimbra, 2001), 331-339, World Sci. Publishing, River Edge, NJ, 2002.
55. C.M. Campbell, J.D. Mitchell, N. Ruskuc, Comparing semigroup and monoid presentations for finite monoids, Monatsh. Math. 134 (2002), 287-293. DOI: 10.1007/s605-002-8263-7.
56. C.M. Campbell, E.F. Robertson, N. Ruskuc, R.M. Thomas, Automatic completely simple semigroups, Acta Math. Hungar. 95 (2002), 201-215. DOI: 10.1023/A:1015632704977.
57. L. Descalco, N. Ruskuc, On automatic Rees matrix semigroups, Comm. Algebra 30 (2002), 1207-1226. DOI: 10.1080/00927870209342378.
58. M. Hoffmann, N. Ruskuc, R.M. Thomas, Automatic semigroups with subsemigroups of finite Rees index, Internat. J. Algebra Comput. 12 (2002), 463-476. DOI: 10.1142/S0218196702000833.
59. S.A. Linton, G. Pfeiffer, E.F. Robertson, N. Ruskuc, Computing transformation semigroups, J. Symb. Comput. 33 (2002), 145-162. DOI: 10.1006/jsco.2000.0406.
60. E.F. Robertson, N. Ruskuc, M.R. Thomson, On finite generation and other finiteness conditions for wreath products of semigroups, Comm. Algebra 30 (2002), 3851-3873. DOI: 10.1081/AGB-120005823.
61. M.H. Albert, M.D. Atkinson, N. Ruskuc, Regular closed sets of permutations, Theoret. Comput. Sci. 306 (2003), 85-100. DOI: 10.1016/S0304-3975(03)00212-3. arXiv:math/0209022 http://arxiv.org/abs/math/0209022
62. P.M. Higgins, J.M. Howie, N. Ruskuc, Set products in transformation semigroups, Proc. Roy. Soc. Edinburgh Sec. A, 133 (2003), 1121-1135. DOI: 10.1017/S0308210500002833.
63. P.M. Higgins, J.M. Howie, J.D. Mitchell, N. Ruskuc, Countable versus uncountable relative ranks in infinite semigroups of transformations and relations, Proc. Edinburgh Math. Soc. 46 (2003), 531-544. DOI: 10.1017/S0013091502000974.
64. P.M. Higgins, J.D. Mitchell, N. Ruskuc, Generating the full transformation semigroup using order preserving mappings, Glasgow Math. J. 45 (2003), 557-566. DOI: 10.1017/S0017089503001460. Offprint.
65. E.F. Robertson, N. Ruskuc, M.R. Thomson, Finite generation and presentability of wreath products of monoids, J. Algebra 266 (2003), 382-392. DOI: 10.1016/S0021-8693(03)00311-9.
66. M.H. Albert, S.A. Linton, N. Ruskuc, The insertion encoding of permutations, Electron. J. Combin. 12 (2005), Research Paper 47, 31 pp. (electronic). Offprint.
67. M.D. Atkinson, M.M. Murphy, N. Ruskuc, Pattern avoidance classes and subpermutations, Electron. J. Combin. 12 (2005), Research Paper 60, 18 pp. (electronic). Offprint.
68. L. Descalco, N. Ruskuc, Subsemigroups of the bicyclic monoid, Internat. J. Algebra Comput. 15 (2005), 37-57. DOI: 10.1142/S0218196705002098.
69. E.R. Dombi, N.D. Gilbert, N. Ruskuc, Finite presentability of HNN extensions of inverse semigroups, Internat. J. Algebra Comput. 15 (2005), 423-436. DOI: 10.1142/S021819670500227X.
70. P. Gallagher, N. Ruskuc, Finitary power semigroups of infinite groups are not finitely generated, Bull. London Math. Soc. 37 (2005), 386-390. DOI: 10.1112/S0024609304004175.
71. P. Gallagher, N. Ruskuc, Generation of diagonal acts of some semigroups of transformations and relations, Bull. Austral. Math. Soc. 72 (2005), 139-146. DOI: 10.1017/S0004972700034924.
72. R. Gray, N. Ruskuc, Generating sets of completely simple 0-simple semigroups, Comm. Algebra 33 (2005), 4657-4678. DOI: 10.1080/00927870500276676.
73. A.J. Cain, E.F. Robertson, N. Ruskuc, Subsemigroups of virtually free groups: finite Malcev presentations and testing for freeness, Math. Proc. Cambridge Philos. Soc. 141 (2006), 57-66. DOI: 10.1017/S0305004106009236. Offprint.
74. A.J. Cain, E.F. Robertson, N. Ruskuc, Subsemigroups of groups: presentations, Malcev presentations, and automatic structures, J. Group Theory 9 (2006), 397-426. DOI: 10.1515/JGT.2006.027.
75. P.M. Higgins, J.D. Mitchell, M. Morayne, N. Ruskuc, Rank properties of endomorphisms of infinite partially ordered sets, Bull. London Math. Soc. 38 (2006), 177-191. DOI: 10.1112/S0024609305018138.
76. C.A. Carvalho, N. Ruskuc, Finite presentability of Bruck-Reilly extensions of semilattices, Comm. Algebra 34 (2006), 3301-3313. DOI: 10.1080/00927870600778563.
77. C.A. Carvalho, N. Ruskuc, On finite presentability of Bruck-Reilly extensions of a monoid endomorphism and its powers, Algebra Colloq. 14 (2007), 389-402.
78. C.A. Carvalho, N. Ruskuc, A finitely presented monoid with a non-finitely generated group of units, Arch. Math. 89 (2007), 109-113. DOI: 10.1007/s00013-007-2138-y.
79. C.A. Carvalho, N. Ruskuc, Finite presentability of Bruck-Reilly extensions of Clifford monoids, J. Algebra Appl. 6 (2007), 801-814. DOI: 10.1142/S0219498807002508.
80. P. Gallagher, N. Ruskuc, On finite generation and presentability of Schutzenberger products, J. Austral. Math. Soc. 83 (2007), 357-367. DOI: 10.1017/S1446788700037976.
81. R. Brignall, N. Ruskuc, V. Vatter, Simple permutations: decidability and unavoidable structures, Theoret. Comput. Sci. 391 (2008), 150-163. DOI: 10.1016/j.tcs.2007.10.037. arXiv:1003.3176.
82. A.J. Cain, G. Oliver, N. Ruskuc, R.M. Thomas, Automatic presentations for cancellative semigroups, in Language and Automata Theory and Applications, Lecture Notes in Computer Science 5196, Springer, Berlin, 2008.
83. A.J. Cain, E.F. Robertson, N. Ruskuc, Cancellative and Malcev presentations for finite Rees index subsemigroups and extensions, J. Australian Math. Soc. 84 (2008), 39-61. DOI: 10.1017/S1446788708000086. Preprint.
84. L. Descalco, N. Ruskuc, Properties of the subsemigroups of the bicyclic monoid, Czech. Math. J. 58(133) (2008), 311-330. DOI: 10.1007/s10587-008-0018-7. Preprint.
85. R. Gray, N. Ruskuc, Green index and finiteness conditions for semigroups, J. Algebra 320 (2008), 3145-3164. DOI: 10.1016/j.jalgebra.2008.07.008. Preprint.
86. S. Huczynska, N. Ruskuc, Pattern classes of permutations via bijections between linearly ordered sets, Europ. J. Combinat. 29 (2008), 118-139. DOI: 10.1016/j.ejc.2006.12.005. Preprint.
87. A.J. Cain, G. Oliver, R.M. Thomas, N. Ruskuc, Automatic presentations for semigroups, Inform. and Comput. 207 (2009), 1156-1168. DOI: 10.1016/j.ic.2009.02.005. Preprint.
88. R. Gray, N. Ruskuc, On residual finiteness of direct products of algebraic systems, Monathsh. Math. 158 (2009), 63-69. DOI: 10.1007/s00605-008-0036-4. Preprint.
89. E. Dombi, N. Ruskuc, On generators and presentations of semidirect products in inverse semigroups, Bull. Austral. Math. Soc. 79 (2009), 353-365. DOI: 10.1017/S0004972708000890. Preprint.
90. V. Maltcev, J.D. Mitchell, N. Ruskuc, The Bergman property for semigroups, J. London Math. Soc. 80 (2009), 212-232. DOI: 10.1112/jlms/jdp025. Preprint.
91. M.H. Albert, M.D. Atkinson, R. Brignall, N. Ruskuc, R. Smith, J. West, Growth rates for subclasses of Av(321), Electron. J. Combin. 17(1) (2010), Research Paper 141, 16 pp. (electronic). Offprint.
92. M.H. Albert, S.A. Linton, N. Ruskuc, On the permutational power of token passing networks, in `Permutation Patterns (St Andrews 2007)' (S.A. Linton, N. Ruskuc, V. Vatter, eds.), LMS Lecture Notes Series 376, CUP, Cambridge, 2010, 317-338. DOI: 10.1017/CBO9780511902499.016.
93. A.J. Cain, G. Oliver, R.M. Thomas, N. Ruskuc, Automatic presentations and semigroup constructions, Theory Comput. Syst. 47 (2010), 568-592. DOI: 10.1007/s00224-009-9216-4. Preprint.
94. S.A. Linton, N. Ruskuc, V. Vatter, eds., Permutation Patterns (St Andrews 2007), LMS Lecture Notes Series 376, CUP, Cambridge, 2010. DOI: 10.1017/CBO9780511902499.
95. M. Quick, N. Ruskuc, Growth of generating sets for direct powers of classical algebraic structures, J. Austral. Math. Soc. 89 (2010), 105-126. DOI: 10.1017/S1446788710001473. Preprint.
96. M.D. Atkinson, N. Ruskuc, R. Smith, Substitution-closed patterns classes, J. Combinat Theory A 118 (2011), 317-340. DOI: 10.1016/j.jcta.2010.10.006. Preprint.
97. M.H. Albert, S.A. Linton, N. Ruskuc, V. Vatter, S. Waton, On Convex Permutations, Discrete Math. 311 (2011), 715-722. DOI: 10.1016/j.disc.2011.01.009. Preprint.
98. R. Brignall, N. Ruskuc, V. Vatter, Simple extensions of combinatorial structures, Mathematika 57 (2011), 193-214. DOI: 10.1112/S0025579310001518. arXiv:1003.3176
99. C.A. Carvalho, R. Gray, N. Ruskuc, Presentations of inverse semigroups, their kernels and extensions, J. Austral. Math. Soc. 90 (2011), 289-316. DOI: 10.1017/S1446788711001297. Preprint.
100. I. Dolinka, N. Ruskuc, Finite groups are big as semigroups, Arch. Math. 97 (2011), 209-217. DOI: 10.1007/s00013-011-0297-3. Preprint.
101. R. Gray, N. Ruskuc, Generators and relations for subsemigroups via boundaries in Cayley graphs, J. Pure Appl. Algebra 215 (2011), 2761-2779. DOI: 10.1016/j.jpaa.2011.03.017. Preprint.
102. A.J. Cain, R. Gray, N. Ruskuc, Green index in semigroups: generators, presentations and automatic structures, Semigroup Forum 85 (2012), 448-476. DOI: 10.1007/s00233-012-9406-2. arXiv:1003.3176.
103. A.J. Cain, N. Ruskuc, R.M. Thomas, Unary FA-presentable semigroups, Internat. J. Algebra Comput. 22 (2012), ??-??. DOI: 10.1142/S0218196712500385. Preprint.
104. R. Gray, N. Ruskuc, Free idempotent generated semigroups over the full transformation monoid, Proc. London Math. Soc. 104 (2012), 997-1018. DOI: 10.1112/plms/pdr054. arXiv:1101.1833v1.
105. R. Gray, N. Ruskuc, On maximal subgroups of free idempotent generated semigroups, Israel J. Math. 189 (2012), 147-176. DOI: 10.1007/s11856-011-0154-x. arXiv:1003.3176.
106. J.T. Hyde, N.J. Loughlin, M. Quick, N. Ruskuc, A.R.Wallis, On the growth of generating sets for direct powers of semigroups, Semigroup Forum 84 (2012), 116-130. DOI: 10.1007/s00233-011-9352-4. Preprint.
107. N. Abu-Gazalh, N. Ruskuc, On semigroups which are unions of finitely many copies of the free monogenic semigroup, Semigroup Forum, to appear. DOI: 10.1007/s00233-013-9468-9. arXiv:1205.6169.
108. M.H. Albert, M.D. Atkinson, M. Bouvel, N. Ruskuc, V. Vatter, Geometric Grid Classes of Permutations, Trans. Amer. Math. Soc., to appear. arXiv:1108.6319.
109. I. Dolinka, N. Ruskuc, Every group is a maximal subgroup of the free idempotent generated semigroup over a band, Internat. J. Algebra Comput., to appear. arXiv:1301.1225.
110. R. Gray, V. Maltcev, J.D. Mitchell, N. Ruskuc, Ideals and finiteness conditions for subsemigroups, GlasgowMath. J., to appear. arXiv:1204.6602.
111. M.H. Albert, N. Ruskuc, V. Vatter, Inflations of geometric grid classes of permutations, submitted. arXiv:1202.1833.
112. A.J. Cain, N. Ruskuc, Unary FA-presentable binary relations: transitivity and classification results, submitted. arXiv:1303.0214.
113. A.J. Cain, N. Ruskuc, Subalgebras of FA-presentable algebras, submitted. arXiv:1206.5548.
114. R. Gray, N. Ruskuc, On residual finiteness of monoids, their Schützenberger groups and associated actions, submitted. arXiv:1003.3176.
115. V. Maltcev, N. Ruskuc, On hopfian cofinite subsemigroups, submitted.
116. M. Neunhöffer, M. Pfeiffer, N. Ruskuc, Deciding word problems of semigroups using finite state automata, submitted.