University of Leicester


photo of Irek Ulidowski

STAFF — Irek Ulidowski   B.Sc. (Queen Mary), M.Sc., Ph.D. (Imperial College)

Associate Professor in Computer Science
G12 Informatics Building
Department of Informatics,
University of Leicester,
University Road,
LE1 7RH.

T: +44 (0)116 252 3801
F: +44 (0)116 252 3604

I received a BSc degree in Mathematics with Computer Science from Queen Mary College, University of London in 1987. Then, in 1988, I was awarded MSc in the Foundations of Advanced Information Technology at the Department of Computing of Imperial College, University of London. I stayed at Imperial College for several more years while conducting doctorate research, and in 1994 I received a PhD degree for a thesis Local Testing and Implementable Concurrent Processes.

I was appointed to a Lectureship in the School of Computing, University of North London in 1992. From September 1994 to December 1997, I held a position of Associate Professor at the Research Institute for Mathematical Sciences (RIMS) of Kyoto University, Japan. In 1998 I was appointed to the Department of Mathematics and Computer Science, University of Leicester, and am currently a member of the Department of Computer Science within the College of of Science and Engineering.


  • Models of Reversible Computation: reversing CCS and other process calculi; semantics of true concurrency (bisimulations, modal logics) via reversibility; modelling of bio-systems with reversible process calculi, reversible DI-circuits and reversible cellular automata.
  • Process Calculi: operational semantics; testing and game semantics; behavioural equivalences; proof systems; process calculi with discrete time.
  • Structured Operational Semantics: formats of SOS rules, congruence results; automatic generation of proof systems; automatic generation of rewrite systems; formats for discrete time and timed properties.
  • Modelling in Ubiquitous Computing: location, movement, mobility, communication.
  • Operational semantics for Service Oriented Computing.
  • Term Rewriting: term rewriting with priorities, termination and confluence; automatic generation of priority term rewrite systems.

Professional Activities

Conferences and Workshops

Research Students

  • Stefan Kuhn
  • James Hoey. James's PhD degree is funded by a PhD studentship from the College of Science and Engineering PhD Studentship Scheme.

If you are interested in PhD research in one of the above listed areas, and would like to discuss a possible course of study, then please get in touch by email.


  • Year Leader for the final year of BSc/MComp degrees.
  • Member of the College Academic Committee and the Departmental Academic Committee.
  • Member of the Appeal Panels and Member of the Interview Panels.


  • CO1108: Foundations of Computation.
  • CO2011: Automata, Languages and Computation.
  • CO3007 and CO7007: Communication and Concurrency.
  • CO3014/CO3015/CO3120: BSc Projects.

Author: Irek Ulidowski (, T: +44 (0)116 252 3801.
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