**Plenary and Colloquium Talks (total 81)**

- Mathematisches Oberseminar: Mathematische Logik, Ludwig Maximillian University, Munich, 2005
- Moscow Computer Science School, Moscow, 2004
- Conference “New Developments in Logics of Knowledge and Belief”, New York, 2004
- International Logic and Computer Science Semester at Tel Aviv, Logic and Computation. Tel Aviv, 2004
- 9th Estonian Winter School in Computer Science EWSCS’04. Estonia, Palmse, 2004
- Conference Provability Logic: New Frontiers, Utrecht, the Netherlands, 2004
- Computer Science Logic Symposium, a keynote evening lecture (ps, pdf). Vienna, Austria, 2003
- Kolmogorov and Contemporary Mathematics, Moscow, 2003
- Brooklyn College, Computer Science Colloquium, 2002
- Lecture series: North American Summer School in Logic Language and Information (NASSLLI’02) ( ps, pdf ), 2002
- Chinese Academy of Sciences, the Institute of Software, Beijing, 2002
- Tsinghua University – Beijing, Mathematics Colloquium, 2002
- Tsinghua University – Beijing, Computer Science Colloquium, 2002
- New York Academy of Sciences, Distinguished Lecture in Computer Science, 2002
- Computer Science Colloquium, Berne University, 2002
- Dagstuhl-Seminar on Proof Theory in Computer Science, Germany, 2001
- AMS session on Proof Theory and Foundations of Mathematics, Columbus, Ohio, 2001
- International Conference on Logic, Algebra and Set Theory, Steklov Institute, Moscow, 2001
*Logic Colloquium’01*, Section Philosophy and History of Logic, Vienna, 2001- Moscow-Vienna Workshop on Logic and Computation, 2000
- Cornell University, Math Department Colloquium, 2000
*Workshop on Logic, Language, Information and Computation*(*WoLLIC’00)*, Natal, Brazil, 2000- Moscow Mathematical Society, 2000
- Ohio State University, Columbus, 2000
- Hebrew University, Jerusalem, Intsitute of Computer Science, 2000
- Technion, Haifa, Israel, 2000
- Tel Aviv University, Department of Computer Science, 1999
- Workshop
*Collegium Logicum: Proof Theory*, Vienna, Austria, 1999 - Spinoza Lecture from
*European Association for Logic, Language and Information*, 1999 - Lecture series,
*European Summer School in Logic, Language and Information*(*ESSLLI’99*), Utrecht, the Netherlands, 1999 - Plenary address at the European Summer Meeting of Association for Symbolic Logic (
*Logic Colloquium’99*), Utrecht, the Netherlands, 1999 *Intuitionistic Modal Logic and Applications,*Workshop, Trento, 1999- Tutorial Workshop
*Realizability Semantics and Applications,*Trento, Italy, 1999 - University of Wisconsin, Madison, Department of Mathematics, 1998
- Moscow University, Department of Logic and Computation, 1998
*Workshop on Logic, Language, Information and Computation*(*WoLLIC’98*), Sao Paulo, Brazil, 1998- Tutorial at
*Workshop on Logic, Language, Information and Computation WoLLIC’98*, Sao Paulo, Brazil, 1998 - Tutorial at Symposium
*Advances in Modal Logic*(*AiML’98 )*, Uppsala, Sweden, 1998 - George Boolos Symposium, M.I.T., 1997
- Workshop on
*Logic, Language and Computation*(*LLC’6*), CSLI, Stanford, 1997 - IEEE Conference on Decision and Control, Session
*Control and Verification of Hybrid Systems*(joint talk with A.Nerode), San Diego, 1997 - Cornell University, Department of Mathematics, 1997
- Stanford University, Department of Mathematics, 1997
- University of California, San Diego, Department of Mathematics, 1997
- Cornell University, Department of Mathematics, 1966
- Moscow University, Faculty of Mechanics and Mathematics Colloquium, 1996
- European Symposium
*Computer Science Logic*(*CSL’96*), Utrecht, the Netherlands, 1996 - Annual conference
*Block seminar Berne-Zurich in Informatik und Logik,*Zurich, Switzerland, 1995 *Proof Theory*conference, Oberwolfach, Germany, 1995- International conference on
*Non-Standard Logics,*Irkutsk, Russia, 1995 - INTAS Workshop
*Logic in Computer Science*, St. Petersburg, Russia, 1995 - Moscow University, Department of Logic and Computation, 1995
- Princeton University, Department of Computer Science, 1995
- Annual conference
*Block seminar Berne-Zurich in Informatik und Logik,*Bern, Switzerland, 1994 - International Conference
*Logic and Algebra*dedicated to the memory of Roberto Magari, Siena, Italy, 1994 - IEEE Symposium
*Logical Foundations of Computer Science*(*LFCS’94)*, St. Petersburg, Russia, 1994 - Logic conference Amsterdam-Muenster, the University of Muenster, Germany, 1994
- Annual conference
*Block seminar Berne-Zurich in Informatik und Logik*, Zurich, Switzerland, 1993 - CNRS, Laboratory for Informatics, Robotics asnd Microelectronics in Montpellier, France, 1993
- Graduate School in Mathematical Logic, Siena, Italy, 1993
- CNRS, Laboratory for Discrete Mathematics, Marseille, France, 1993
- Annual conference
*Block seminar Berne-Zurich in Informatik und Logik,*Bern, Switzerland, 1992 - Second Russian National Conference on Applied Logic, Novosibirsk, Russia, 1992
- Symposium in Logic and Informatics, Luminy, Marseille, France, 1992
- IEEE Symposium on Logical Foundations of Computer Science (
*LFCS’92)*, Tver, Russia, 1992 - CNRS, Laboratory for Informatics, Robotics asnd Microelectronics in Montpellier, France, 1992
- Institute for Logic, Language and Computation, Amsterdam, The Netherlands, 1992
- CIRM Colloquium in
*Logic and Computer Science*, Marseille, France, 1991 - Conference
*Provability-Interpretability-Arithmetic*, Utrecht, the Netherlands, 1991 - University of Florence, Logic Colloquium, Italy, 1991
*Kleene’90*Symposium, Varna, Bulgaria, 1990- II USSR National Conference in Applied Logic, Novosibirsk, USSR, 1990
- Moscow University, Department of Logic and Computation, 1989
- IX USSR National Conference in Mathematical Logic, Leningrad, USSR, 1988
- Moscow University, Department of Logic and Computation, 1987
- VIII USSR National Conference in Mathematical Logic, Moscow, USSR, 1986
- Algebra i Logika Seminar, Novosibirsk, 1986
- Moscow University, Department of Logic and Computation, 1985
- University of British Columbia, Canada, Department of Mathematics, 1983
- University of Calgary, Canada, Department of Mathematics, 1983
- University of Manitoba, Dapertment of Mathematics and Astronomy, Winnipeg, Canada, 1983
- Moscow University, Department of Logic and Computation, 1980

About 20 contributed and short (1/2 hour or less) conference talks (including such confereneces as * CADE *, *TARK *, *CSL , LFCS *, etc) .