UCLA Mathematics Department,
B.S., University of Bucharest, 1976; M.S., University of Bucharest, 1977
Ph.D., University of Bucharest, 1983 (advisor Dan Voiculescu)
Professor, UCLA Department of Mathematics, 1987-present (Chair 2009-2012)
Professor, University of Geneva, 1996-1998
Principal Researcher, INCREST, 1977-87
Sabbaticals and Visiting Positions
Visiting Professor Institut de Mathematique de Jussieu, April -
Institute Henri Poincare (Paris), program "Groups Acting on Fractals, Hyperbolicity and Self-Similarity", April 10-July 10, 2022.
MSRI Simons Visiting Professor March-May 2020
Visiting Professor RIMS and Kyoto University, April 2019
Newton Institute in Cambridge, member of the program ``Subfactors'', Spring 2017.
Visiting Professor Institut de Mathematique de Jussieu (under a Chaire FSMP-FMJH) July 2016-June 2017
Visiting Professor RIMS and Kyoto University, September 2016
Hausdorff Institute in Bonn, member/organiser of the program ``von Neumann Algebras'', May-July 2016
Mittag-Leffler Institute, member of the program in ``Classification in Operator Algebras'', April 2016
Visiting Professor at CNRS and Institut de Mathematique de Jussieu Paris 6&7, July 2012-September 2013
Visiting Professor at Institut Henri Poincare (under a Chaire Blaise Pascal), April-July 2011
Visiting Professor, College de France and CNRS, 2004-2005
Mathematical Sciences Research Institute Yearlong Member 2000-2001
Visiting Professor, University of Paris 6 & 7, 1992, 1995-1996, Summer 2001
Visiting Professor, E. Schroedinger Institute, Viena, Austria, Summer 1994
Institut des hautes Etudes Scientifiques Yearlong Member 1991-1992
Visiting Professor, Institute des Hautes Etudes Scientifiques, June 1989, Spring 1990
NSF-Grant DMS-1955812: Ergodic embeddings, bimodule decomposition, and structure of II$_1$ factors, 2020-2023
NSF Grant DMS-1700344: Rigidity, L^2-cohomology, and approximate embeddings in II_1 factors, 2017-2020
NSF Grant DMS-1400208: Approximation, Deformation-Rigidity, and Classification in II_1 Factor Framework, 2014-2017
NSF Grant DMS-1101718, 2011-2014; NSF Grant DMS-0100883, 2001-2006; NSF Grant DMS-0605456, 2006-2011
Fond National Suisse Grant, 1996-1998; NSF Grant DMS-9500882, 1995-1998; NSF Grant DMS-9801324, 1998-2001
Honors, special recognition, etc
Takesaki Endowed Chair in Operator Alegbras 2018-2023
Simons Participant and Senior Fellow IPAM Program ``Quantitative Linear Algebra'' Spring 2018
The John von Neumann Lecture, Muenster University, May 4th 2017
Distinguished Lecture Series College de France, Paris, Nov. 10-24, 2016
Chaire d'Excellence Fondation des Sciences Mathematiques de Paris (FSMP) and Chaire Mathematique Jacques Hadamard (FMJH), July 2016- June 2017
Simons Fellow in Mathematics 2016-2017
Plenary speaker at the Congress of Scandinavian Math Society, March 20th 2016.
Lectures Univ. of Illinois Urbana Champaign Feb 2-4,
Coxeter Lecture Series, Fields Institute, May 2014
Takagi Lecture May 2013
Elected to the American Academy of Arts and Sciences 2013
Fellow of the American Math Society 2012
Simons Fellow in Mathematics 2012-2013
E. H. Moore Research Article Prize 2010 (of the American Math Society)
Ostrowski Prize 2009
Chaire Blaise Pascal 2009
Plenary Speaker Canadian Mathematical Society Annual Meeting, Ottawa, Dec 2008
Bourbaki Seminar given by S. Vaes on items [57,64,70,73] of my Publications, June 2007
Plenary Speaker International Congress of Mathematics,
College de France Medal and Special Lecture Series, Nov. 2004
Plenary Speaker AMS Meeting, Vanderbilt University, Oct. 2004
Bourbaki Seminar given by A. Connes on item  of my Publications, June 2003
Invited Address Joint Annual AMS Meeting, San Antonio, Jan. 1999
Top 250 most cited mathematicians in Thompson Reuters
Guggenheim Fellow, 1995-1996
CBMS Lecture Series ``Classification of subfactors and related topics", Univ. of Oregon 1993
Invited Address Section 9 International Congress of Mathematics, Kyoto, Japan , 1990.
Simion Stoilov Prize of the Romanian Academy of Sciences, 1981
Dietmar Bisch (1991) Professor Vanderbilt University
Florin Radulescu (1991) Professor University of Rome 2
Florin Boca (1993) Professor University of Illinois at Urbana-Champaign
Tullio Ceccherini (1994) Professor University of Benevento, Italy
Mihai Petrescu (1997) Video-Software Company, California.
Remus Nicoara (2004) Associate Professor, University of Tennessee Knoxville
Roman Sasyk (2004) Associate Professor University of Buenos Aires
Jesse Peterson (2006) Associate Professor Vanderbilt University
Adrian Ioana (2007) Professor UCSD
Ionut Chifan (2009) Associate Professor, Univ. of Iowa.
Hiroki Sako (2009; jointly with Yasu Kawahigashi) Associate Professor, Niigata University, Japan
Adam Winchester (2012) Software Company Los Angeles
Owen Sizemore (2012) Software Company, Wisconsin Madison
Brian Leary (2015), Associate Professor at West Virginia University Institute of Technology
Alin Galatan (2016) software engineer at Twitter Company
Adreas Aaserud (2016) Postdoc (Research associate) at University of Cardiff School of Mathematics
Cyril Houdayer, 2007-2009 (Hedrick postdoc)
Thomas Sinclair, 2011-2014 (RTG-Hedrick postdoc)
David Penneys, 2014-2016 (UCLA postdoc)
Brian Leary, 2015-2016 (UCLA adjunct)
Yusuke Isono, 2015-2016 (Japan postdoc fellowship at UCLA)
Daniel Hoff, 2016-2020 (RTG Hedrick, then Adjunct)
Rolando de Santiago, 2017-2020 (RTG Hedrick, then UC President Fellow)
March Boedihardjo, 2016-2020 (Hedrick, then Adjunct)
Pieter Spaas, 2019-2022 (Hedrick postdoc)
Srivatsav Kunnawalkam Elyayavalii, 2022-2023 (IPAM/UCLA postdoc)
Changying Ding, 2023-2026 (Hedrick postdoc)
Hausdorf Institute for Mathematics (HIM), University of Bonn,
August 28th- September 2nd, 2022.
Coorganizer (with Alice Guionnet, Assaf Naor, Gilles Pisier, Dima Shlyakhtenko, Nikhil Srivastava, Terry Tao) of the Program ``Quantitative Linear Algebra'', 03/19-06/15 2018, IPAM (UCLA)
Coorganizer (with Damien Gaboriau, Cyril Houdayer and Stefaan Vaes) of the conference ``von Neumann Algebras and Measured Group Theory'', July 3-7, 2017, IHP (Paris)
Coorganiser (with D. Bisch, V.F.R. Jones and D. Shlyakhtenko) of the Program ``von Neumann Algebras'', Hausdorff Institute in Bonn, May 2 - August 15 2016.
Coorganiser (with Dima Shlyakhtenko) of the UCLA mini-conference ``Ergodic Theory and Logic'', January 15th, 2016.
Coorganiser (with A. Ioana, J. Peterson, D. Shyakhtenko) of the UCLA Workshop ``von Neumann algebra and Ergodic Theory'', September 2014.
Coorganiser of the Summer School in ``Rigidity and Group Actions'', Paris, June 13-28, 2013.
Coorganizer of the UCLA Workshop ``von Neumann Algebras and Ergodic Theory'', May 2012, March 2009, March 2007.
Coorganiser (with Damien Gaboriau and Stefaan Vaes) of the program Von Neumann algebras and ergodic theory of group actions, April 18 - July 9, 2011, IHP (Paris).
Coorganizer (with A. Ioana, N. Ozawa, Y. Shalom) of the Special Session ``von Neumann Algebras and Ergodic Theory'', AMS Meeting, UCLA Oct 10-12, 2010.
Coorganiser of Spring Institute ``Non-commutative geormetry and Operator Algebras'', Vanderbilt, May 2010.
Coorganizer of the Oberwolfach Conference in ``von Neumann Algebras and Ergodic Theory'', Oct. 26-30, 2008.
Coorganizer of the Fields Institute Workshop in ``von Neumann Algebras'', Oct 29-Nov 2, 2007.
Coorganizer of the UCLA Workshop ``von Neumann Algebras and Ergodic Theory'', March 2007.
Coorganizer of the UCLA Conference ``Beyond Amenability: Groups, Actions and Op. Alg. '', May 2006
Coorganizer of the AMS Section Meeting ``von Neumann Algebras'', Vanderbilt Univ., October 2004
Coorganizer of the UCLA Conference ``von Neumann Algebras and Ergodic Theory'', May 2003
Editor: Pacific Journal of Mathematics,
Editorial Board: Journal of the American Mathematical Society (2005-2012), Journal of Operator Theory (Editor 1986-1988), Annali dell'Universita di Ferrara,
Revue Roumaine de Math. Pures et Appl., PanAmerican Mathematical Journal
Co-Editor of the Clay Math Institute Proceedings ``Non-commutative Geometry'', April 2007 Conference in honour of A. Connes.
ICM 2010 Panel Section 9 Speaker Committee (Chair)
ICM 2018 Program Committee, 2016-2018 (member)
ICM 2022 Panel Speaker Committee for Section 8 (Analysis), 2020-2022 (member)
Committee member for the inaugural ``Foias Prize in Operator Theory'' 2021.
Invited talk at the Conference ``Operator Algebras and
Mathematical Physics (Yasu's Festa)'', Tokyo University,
July 24-28, 2023.
Invited talk at the Conference ``Subfactor Theory'', Newton Institute, Cambridge, June 26-30, 2023.
Invited talk at the Workshop ``Where mathematics Meets Quantum Physics: a workshop on the occasion of Roberto Longo's 70th birthday'',
Rome, June 21-23, 2023.
Invited talk at the Conference ``Groups and Operator Algebras'', Inst. of Math. Orsay, June 6-9, 2023.
Invited talk at the Conference ``Modern Trends in Operator Algebras'', UCLA, March 25-29, 2023.
Invited talk at the Workshop ``von Neumann algebras and geometric group theory'', UCSD, Feb. 1012, 2023.
Invited talk at the Oberwolfach meeting in ''C*-algebras", August 7-13, 2022.
Invited talk at the workshop "Operator Algebras: Subfactors, K-theory, Conformal Field Theory" in Gregynog Hal (Wales), July 28-Aug 2, 2022.
Invited speaker at the Satellite ICM Converence "Operator Algebras, Dynamics, Groups and Applications", U. of Copenhagen (Denmark), July 1-4, 2022.
Invited talk "Operator Algebras and Applications" Conference August 26, 2021, Univ. of Tokyo (Japan).
Invited talk "Operator Algebras and Related Fields" Conference June 8-10, 2021, Istanbul Center for Math Sci (Turkey)
Invited talk at "Mathematical Picture Harvard Seminar" March 9, 2021, Harvard Univ.
Invited talk Oberwolfach Conference ``Groups, Dynamics, and Approximation'', Dec 2-7, 2019
Invited speaker ``Memorial Conference for Dick Kadison'', Copenhagen Univ., Nov 29-30, 2019
Invited speaker Banff Workshop ``Classification problems in vN algebras'', Oct 1-4, 2019
Invited talk Oberwolfach Conference ``C*-algebras'', August 12-18, 2019
Invited talk GPOTS, May 28-June 1 2019
Colloquium talk Kyoto University April 24, 2019
KTGU Lecture Series RIMS and Kyoto University, April 8-12, 2019
Invited talks at the Workshops of the Program ``Quantitative Linear Algebra'', March-May, 2018.
Invited talk at the AIM Conference on ``Classification of group von Neumann algebras'', Jan 29-Feb 2, 2018
Invited talk, Conference "Non-commutative geometry" in honor of A. Connes 70th birthday, Fudan Univ. Shanghai, 03/28-04/02 2017
Invited talk at the workshop ``Subfactors'', Newton Institute, Cambridge, UK, January 22-27, 2017
Colloquium talks at Bordeaux University (October 2016) and Univ. of South Paris (March 2017).
Invited talk at the
Oberwolfach Conference in ``C*-Algebras'', August 21-27,
Series of talks at the ``Operator Algebras and Mathematical Physics'' Conference in Sendai (Japan), August 1-14, 2016
Invited Speaker at the CMTP Conference Operator Algebras and Conformal Field Theory in Rome June 27-29, 2016
Invited Speaker at the ``Haagerup Symposium'', Coopenhagen June 24-26, 2016
Invited Speaker NCGOA Conference at Hausdorff Institute May 17-25, 2016
Talk at the Mittag-Leffler Institute April 2016
Invited Speaker ``Non-commutative Geometry'' Conference for G. Skandalis' 60th, CIRM (Luminy), November 2015.
Invited Speaker ``East Coast Operator Algebra Conference'', U. of Iowa, Oct 2015.
Invited talk at Oberwolfach Conference in ``Non-commutative Geometry'', June 2015.
Invited speaker ``Great Plains Operator Theory'' Conf. Purdue University, May 2015.
Mini Course at the Spring Institute Non-Commutative Geometry and operator Algebras, Vanderbilt Univ. May 2015
Series of talks at the Operator Algebra Conference, Te Anau, New Zealand, January 2014
Colloquium talk UCLA October 2013
Series of talks at the Summer School in ``Rigidity and Group Actions'', Paris, June 13-28, 2013
Invited speaker ``Mathematics and quantum physics'', Academia dei Lincei, Rome, July 8-12, 2013
Invited Speaker ``von Neumann algebras and measurable group theory'', Leuven University, July 1-4, 2013.
Invited Speaker ``Math Physics and Operator Algebra'', University of Milano, December 2012.
Invited Speaker ``10 years anniversary of Journal of Inst Math Jussieu'', November 2012.
Invited Speaker ``Interactions Between Ergodic Theory, Number Theory and Noncommutative Geometry'' Conference at Ohio State University, May 2012.
Colloquium Lecture UC San Diego, April 2012.
Invited speaker ``von Neumann Algebras and Related Topics'' conference at RIMS (Kyoto, Japan), Jan 2012.
Chaire Blaise Pascal Closing Conference, Institut Math Jussieu, Oct 2011
Colloquium Lecture University of Rome II (Italy), June 2011
Lecture Series at the Program von Neumann Algebras and Ergodic Theory of Group Actions, Institut Henri Poincare May 2011
Mini Course at the Spring Institute Non-Commutative Geometry and operator Algebras, Vanderbilt Univ. May 2010
Invited Speaker ``Operator Algebras Conference in Honor of Uffe Haagerup's 60the birthday'', Coopenhagen April 2010.
Invited Speaker SUMIRFAS Conference,
Invited Speaker ``Non-commutative Geometry'' Coference in Honor
of Ricu Moscovici 65th Birthday, Max Planck Institute,
Main Speaker ``East Coast Operator Algebra'' meeting,
Invited Speaker ``Operator Algebras'', Oberwolfach Aug 2008.
Invited Speaker ``Geometry, Rigidity and Group Actions'', Conference in Honor
of Bob Zimmer 60'th Bithday, Sept. 6-9, 2007,
Invited Speaker ``von Neumann Algebras and Non-Commutative Geometry'', Coference
in Honor of Alain Connes 60'th Bithday, April 2-6, 2007, Inst Henri Poincare (Paris)
Invited Speaker ``Groupoids in Oper.
Institut Henri Poincare (
Invited Speaker ``US-Japan Conference in Operator Algebras'',
Invited Speaker ``von Neumann algebras''
Invited Speaker ``Logic and Mathematics''
Colloquium lectures University of Michigan and University of Illinois Urbana-Champaign, Feb. 2006
Invited Speaker ``Geom. and prob. methods in group theory and dyn. sys.''
Main Speaker ``East Coast Operator Algebra'' Conference,
Invited Speaker ``Operator Algebra'' Conference, Oberwolfach (
Invited Lecture ``Group actions, rigidity and dynamics'',
Minicourse Lecturer, ``Spring Institute on Noncommutative Geometry'',
Main Speaker, ``Geometric Group Theory and Harmonic Analysis'', Cortona, June 2004
Main Speaker, School in ``von Neumann Algebras'', Marseille, February 2004
Main Speaker: ``Group Theory'',