Reseach Talks

• On the lifting property for the universal C*-algebras of operator spaces
  • Tokyo University, December 1998.
  • Operator Space Workshop at University of Illinois, Urbana-Champaign, March 1999.
• A non-extendable bounded linear map between C*-algebras
  • Texas A&M University, April 1999.
  • University of Houston, May 1999.
  • Tokyo University, June 1999.
• On injectivity and nuclearity for operator spaces (in collaboration with Effros and Ruan)
  • Workshop in Linear Analysis and Probability at Texas A&M University, August 1999.
• A short proof of the Oikhberg-Rosenthal theorem
  • SUMIRFAS at Texas A&M University, August 1999.
• On the set of finite dimensional subspaces of preduals of von Neumann algebras
  • Sur les espaces Lp non-commutatifs à l'IHP, novembre 1999.
• Local theory and local reflexivity
  • CONFERENCE ON OPERATOR SPACES at IHP, January 2000.
  • Tokyo University, January 2000.
• Amenable actions and exactness for discrete groups
  • Séminaire d'Algèbres d'Opérateurs at Collège de France, March 2000.
  • Université Pierre et Marie Curie - Paris 6, March 2000.
  • Tokyo University, April 2000.
• On exactness of reduced group C*-algebras
  • Cardiff University, May 2000.
  • Rencontres sur la conjecture de Baum-Connes à IRMA, Strasbourg, mai 2000.
  • SUMIRFAS at Texas A&M University, August 2000.
  • MSRI, October 2000.
• On OLp spaces
  • Workshop in Linear Analysis and Probability at Texas A&M University, July 2000.
• On the lifting problem for separable C*-algebras
  • Free Probability and Noncommutative Banach Spaces at MSRI, January 2001.
• Almost completely isometric embeddings between preduals of von Neumann algebras
  • University of California at Irvine, March 2001.
  • University of California at Los Angeles, May 2001.
• Exactness for free group factors
  • Tokyo University, June 2001.
  • Workshop in Linear Analysis and Probability at Texas A&M University, July 2001.
• Nuclearity of reduced amalgamated free product C*-algebras
  • Operator Algebras and Their Applications at RIMS, September 2001.
• An application of expanders to B(\ell_2)\otimes B(\ell_2)
  • Tokyo University, October 2001.
  • Annual Meeting on Operator Theory and Operator Algebras, Yufuin, November 2001.
  • C*-Algebren at Mathematisches Forschungsinstitut Oberwolfach, December 2001.
  • Université Pierre et Marie Curie - Paris 6 and Besançon, May 2002.
  • Workshop in Linear Analysis and Probability at Texas A&M University, July 2002.
  • Non-commutative Phenomena and Random Matrices at PIMS (Victoria), August 2002.
• Homotopy invariance of AF-embeddability
  • Aspects of Operator Algebras at RIMS, January 2002.
• A survey on R^\omega embeddability
  • Chiba University, February 2002.
• Homogeneity of the pure state space for a separable C*-algebra
  • Annual Meeting of Math. Soc. Japan at Meiji Univ, March 2002.
  • Operator Space Mini^2 Conference at UT Austin, July 2002.
• A survey on discrete exact groups
  • UC Berkeley, September 2002.
• Application of uncountably many property T groups of Gromov to operator algebras
  • UCLA, October 2002.
  • UC Berkeley, November 2002.
• On Connes' Approximate Embedding Problem
  • UCLA, (2 lectures) January 2003.
  • Penn State University, February 2003.
  • University of Illinois at Urbana-Champaign, March 2003.
  • Rencontre du GdR "Algèbres d'Opérateurs" at Institut de mathématiques de Jussieu, July 2003.
• Solid von Neumann algebras
  • UC Berkeley, February 2003.
  • UCLA, March 2003.
  • University of Illinois at Urbana-Champaign, March 2003.
  • Texas A&M University, August 2003.
  • WCOAS at BIRS, October 2003.
• Some prime factorization results for type II_1 factors
  • Noncommutative Geometry and Applications at Vanderbilt University, May 2003.
  • Recent Advances in von Neumann Algebras at UCLA, May 2003.
  • GPOTS at UIUC, June 2003.
  • Rencontre du GdR "Algèbres d'Opérateurs" at Institut de mathématiques de Jussieu, July 2003.
• Weakly exact von Neumann algebras
  • Espaces d'opérateurs at CIRM, June 2003.
  • UC Berkeley, September 2003.
  • ECOAS at Vanderbilt University, September 2003.
  • Noncommutative Geometry in Mathematics and Physics at CIRM, February 2004.
• A Kurosh type theorem for type II_1 factors
  • UCLA, January 2004.
  • AMS Sectional Meeting at Vanderbilt University, October 2004.
• New progress in the classification of group von Neumann algebras
  • Math Colloquium at UCLA, January 2004.
  • Kansai Operator Algebra Seminar at Kyoto University, May 2004.
  • Tokyo Operator Algebra Semianr at Chiba University, June 2004.
  • SUMIRFAS at Texas A&M University, August 2004.
  • Math Colloquium at University of Iowa, December 2004.
• Hyperbolic groups and type II_1 factors (minicourse)
  • Noncommutative Geometry in Mathematics and Physics at CIRM, February 2004.
  • Penn State University, February 2004.
  • Noncommutative Geometry and Operator Algebras at Vanderbilt University, May 2005.
• On exact discrete groups
  • Tohoku University, May 2004.
  • University of Tokyo, June 2004.
• Amenable Actions And Applications (Slides.pdf)
  • Asymptotic and Probabilistic Methods in Geometric Group Theory at University of Geneva, June 2005.
  • Banach Algebras and Their Applications at Bordeaux, July 2005.
  • Development of Operator Algebras at RIMS, September 2005.
  • Math Colloquium at Kyoto University, October 2005.
  • Operator Algebras and Applications, University of Southern Denmark, April 2006.
  • International Congress of Mathematicians, Madrid, August 2006. ICM Daily News (pdf)
• Survey on the CBAP
  • Kansai Seminar, Osaka Kyoiku University, December 2005.
• An invitation to the similarity problem (after Pisier)
  • Operator Spaces and Their Application, RIMS, January 2006.
• Property (T) for universal lattices, after Y. Shalom
  • UCLA, April 2006.
  • University Tokyo, July 2006.
• A comment on free group factors (Slides.pdf)
  • Free Analysis, American Institute of Mathematics, June 2006.
  • SUMIRFAS, Texas A&M Univ., August 2006.
  • Topics on von Neumann Algebras, BIRS, September 2006.
  • Domestic Workshop on Operator Theory and Operator Algebras, Tohoku University, November 2006.
• Generalized Bozejko-Picardello inequalities
  • Operator Algebras and Related Fields, Hawaii, January 2007.
• Weak amenability of hyperbolic groups
  • Operator spaces, non-commutative L_p-spaces and Applications, CIRM (Marseille), June 2007.
  • Banach spaces and Operator spaces, Chern Institute of Mathematics (Tianjin), July 2007.
  • Workshop on Structure of C*-Algebras, Fields Institute, November 2007.
  • Analyse et Géométrie at Institut de Mathématiques de Jussieu, October 2009.
• Weakly exact von Neumann algebras
  • Meeting on the structure of C*-algebras (Kirchbergfest), Münster, July 2007.
• Recent advances in classification of finite von Neumann algebras
  • Annual Meeting of the Mathmatical Society of Japan, Saitama, March 2007.
  • Banach Algebras 2007, Laval (Québec), July 2007.
• On a class of II_1 factors with at most one Cartan subalgebra (Slides.pdf)
  • Operator Algebra Seminar at University of Tokyo, July 2007.
  • Workshop in Analysis and Probability, Texas A&M University, August 2007.
  • Operator Spaces and Group Algebras, BIRS, August 2007.
  • New Development of Operator Algebras, RIMS (Kyoto), September 2007.
  • Workshop on von Neumann Algebras, Fields Institute, October 2007.
  • Workshop on Operator Spaces and Quantum Groups, Fields Institute, December 2007.
• Rigidity in finite von Neumann algebras (5-hour minicourse),
  • Summer School in Operator Algebras University of Ottawa, August 2007.
• On a class of II_1 factors with at most one Cartan subalgebra II (Slides.pdf)
  • Topics in von Neumann Algebras, BIRS, (2 lectures) March 2008.
  • Operator Algebra Seminar at University of Tokyo, April 2008.
  • Operator Algebras, Dynamics, and Classification, Texas A&M University, August 2008.
  • Non-commutative Harmonic Analysis with Applications to Probability, Będlewo, August 2008.
  • Analytic Properties of Infinite Groups, Genève, August 2008.
  • von Neumann Algebras and Ergodic Theory of Group Actions, Oberwolfach, October 2008.
  • Harmonic analysis, operator algebras and representations, CIRM, November 2008.
  • von Neumann Algebras and Ergodic Theory, UCLA, March 2009.
• von Neumann algebras and ergodic theory (Mini Course)
  • von Neumann algebras, Ergodic theory and Geometric Group theory, IMSc (Chennai), February 2009. (13.5 hours)
  • Summer School: Ergodic Theory of Group Actions, Göttingen, August 2009. (4 hours)
• Dixmier's Similarity Problem (Slides.pdf)
  • Colloquium at Tohoku University, April, 2009.
  • Noncommutative Lp spaces, operator spaces and applications, CIRM, June 2009.
  • Operator Algebra Seminar at University of Tokyo, July 2009.
  • Summer School: Geometry and Rigidity of Groups, Münster, August 2009.
  • Séminaire d'Algèbres d'Opérateurs at Institut de Mathématiques de Jussieu, October 2009.
  • Operators and Operator Algebras University of Edinburgh, December 2009.
  • Colloquium at University of Tokyo, December 2009.
  • KOTAC 2010, Incheon, June 2010.
  • Geometry and Analysis, Kyoto University, March 2011.
  • Seminar at McGill University, April 2013.
• Hyperlinearity, sofic groups and applications to group theory (Mini Course, 3 hours)
  • Operator Spaces and Approximation Properties of Discrete Groups, Texas A&M University, August 2009.
• Quasi-homomorphism rigidity with noncommutative targets (Slides.pdf)
  • Rigidity in cohomology, K-theory, geometry and ergodic theory, HIM (Bonn), November 2009.
  • Functional Analysis Seminar at UCLA, March 2010.
  • Colloquium at University of Hawaii, March 2010.
  • Danish-Norwegian Operator Algebra Seminar, University of Copenhagen, April 2010.
  • Geometry and Ergodic Theory Seminar, EPFL, April 2010.
  • Recent Developments in Operator Algebras, University of Tokyo, June 2010.
  • Satellite Conference on Operator Algebras to ICM 2010, IMSc (Chennai), August 2010.
  • Séminaire d'Algèbres d'Opérateurs at Institut de Mathématiques de Jussieu, September 2010.
  • AMS Fall Western Section Meeting, UCLA, October 2010.
  • Sendai Symposium, Tohoku University, August 2011.
• Closable derivations on finite von Neumann algebras (Mini Course, 3 hours)
  • Noncommutative Geometry and Operator Algebras, Vanderbilt University, May 2010.
• Group measure space von Neumann algebras and measure group theory
  • Actions and Invariants of Residually Finite Groups: Asymptotic Methods, Oberwolfach, September 2010.
• Survey on weak amenability for groups (Slides.pdf)
  • Japanese Western Operator Algebra Seminar, Awarayunomachi, December 2010.
  • Finite Dimensional Approximations of Discrete Groups, Oberwolfach, May 2011.
  • II₁ factors: rigidity, symmetries and classification, IHP (Paris), May 2011.
  • Workshop in Analysis and Probability, Texas A&M University, July 2011.
  • Banach Algebras 2011, Waterloo, August 2011.
  • C*-Algebras and Related Topics, RIMS, September 2011.
  • von Neumann Algebras and Related Topics, RIMS, January 2012.
  • K-Theory, C*-algebras and Topology of Manifolds II, Chern Institute of Mathematics (Tianjin), May 2012.
  • Geometry and Analysis on Discrete Groups, Kyoto, June 2012.
• ME embeddings for groups
  • Embeddings workshop, Isaac Newton Institute, January 2011.
• An introduction to sofic groups
  • Sendai Symposium, Tohoku University, August 2011.
• Weak amenability for groups and its applications (Mini Course)
  • Von Neumann algebras and ergodic theory of group actions, IHP (Paris), May 2011. (6 hours)
  • Winter School on Operator Algebras, RIMS, December 2011. (3 hours)
• Is an irng singly generated as an ideal? (Slides.pdf)
  • Operator Algebra Seminar at University of Tokyo, January 2012.
  • Geometric and Analytic Aspects of Group Theory, Mittag-Leffler Institute, February 2012.
  • Colloquium at Kyoto University, February 2012.
• Introduction to Connes' embedding problem (4-hour minicourse)
  • Workshop on Connes' Embedding Conjecture, Neuchâtel (Switzerland), April 2012.
• More on the fixed point property of semi-direct product groups
  • Workshop in Analysis and Probability, Texas A&M University, July 2012.
  • Operator Algebra Seminar, KU Leuven, September 2012.
  • Groupe de travail "Dynamique mesurable," ENS Lyon, December 2012.
• Survey on the classification of von Neumann factors of type II₁
  • Australian Mathematical Society 56th Annual Meeting, Ballarat, September 2012.
  • SYM Lecture, University of Copenhagen, October 2012.
  • Harmonic Analysis, Operator Algebras and Representations, CIRM, October 2012.
• Connes's Embedding Problem and its equivalent (minicourse)
  • Masterclass on Sofic groups and applications to operator algebras, Copenhagen, November 2012. (6 hours)
  • University of Tokyo, May 2013. (10 hours)
  • Noncommutative Geometry and Applications, Poiana Braşov (România), September 2013. (4 hours)
  • UCLA, October 2013. (4.5 hours)
  • Colloquium at Seoul National University, October 2013.
• Quantum correlations and Tsirelson's problem (Slides.pdf)
  • Séminaire de géométrie et dynamique, ENS Lyon, December 2012.
  • AmenAbility, EPFL, December 2012.
  • Kansai Seminar, February 2013.
  • C*-Algebras and Noncommutative Dynamics, Sde Boker (Israel), March 2013.
  • CRM Colloquium, Montréal, April 2013.
  • Operator Spaces, Harmonic Analysis and Quantum Probability, ICMAT (Madrid), June 2013.
  • PRIMA congress, Shanghai, June 2013.
• Fortifications of Kazhdan's property (4-hour minicourse)
  • Rigidity School, University of Tokyo, January 2013.
• Analytic approximation properties for discrete groups (6-hour minicourse, Handwritten Notes)
  • School on Group C*-algebras, Sde Boker (Israel), March 2013.
• Continuous bundles of tracial von Neumann algebras
  • Workshop on Operator Algebras, University of Tokyo, May 2013.
  • Von Neumann Algebras and Measurable Group Theory, KU Leuven, July 2013.
  • Dynamics, Geometry, and Operator Algebras, Texas A&M University, August 2013.
  • C*-Algebren, Oberwolfach, August 2013.
• An amenable operator algebra which is not a C*-algebra
  • Operator Algebras and Operator Theory Seminar, Seoul National University, November 2013.
• Coarse geometry of discrete groups and applications (2-hour minicourse)
  • Geometry of Moduli Space of Low Dimensional Manifolds, RIMS, November 2013.
• Noncommutative real algebraic geometry of Kazhdan's property (T) (Slides.pdf)
  • Séminaire Géométrie Topologie Dynamique, Orsay, February 2014.
  • Séminaire Dynamique Mesurable, ENS Lyon, February 2014.
  • Séminaire d'Algèbres d'Opérateurs, Paris 7, March 2014.
  • Operator Algebras Seminar, Fields Institute, April 2014.
  • Operator Algebra Seminar, University of Tokyo, April 2014.
  • Conference on Banach methods in Noncommutative Geometry, Wuhan, June 2014.
  • Colloquium, Kyoto University, July 2014.
  • Classification, STructure, Amenability and Regularity, University of Glasgow, September 2014.
  • von Neumann algebras and ergodic theory, UCLA, September 2014.
  • Arithmetic and allied subjects on the banks of the Neva, EIMI, November 2014.
  • Colloquium, UCSD, October 2015.
  • Asian Mathematical Conference (Plenary Speaker), Bali, July 2016.
• Approximation Properties for Group C*-Algebras (4-hour minicourse)
  • Banach and Operator Algebras over Groups, Fields Institute, April 2014.
• Introduction to Noncommutative Real Algebraic Geometry (minicourse)
  • Summer Camp on Operator Algebras, Otaru, July 2014. (6 hours)
  • Hyperbolic Geometry and Geometric Group Theory, University of Tokyo, July 2014. (3 hours)
  • ESI winter school: Measured group theory, ESI, February 2016. (4 hours)
• Elementary amenable groups are quasidiagonal (Slides.pdf)
  • Operator Algebras and Applications (ICM Satellite Conference), Cheongpung, August 2014.
  • Operator Methods in Harmonic Analysis, Belfast, August 2014.
• The Furstenberg boundary and C*-simplicity (Slides.pdf and Notes.pdf)
  • Kyoto Operator Algebra Seminar, RIMS, October 2014.
  • Functional Analysis Seminar, UCLA, February 2015.
  • Workshop on C*-algebras: Structure and Classification, WWU Münster, April 2015.
  • NCGOA, Vanderbilt University, May 2015.
  • Operator Algebra and Harmonic Analysis, TSIMF (Sanya), May 2015.
  • Operator Algebra Seminar, University of Tokyo, June 2015.
  • Noncommutative Geometry, Oberwolfach, June 2015.
  • Symposium: The mathematical legacy of Uffe Haagerup, University of Copenhagen, June 2016.
  • Boundaries of topological groups with applications to Lyapounov exponents, symmetric spaces, and C*-algebras, TSIMF (Sanya), December 2018.
  • Maximal subgroups and (operator) subalgebras, IMPAN, September 2019. (3 hours)
• A functional analysis proof of Gromov's polynomial growth theorem (Slides.pdf)
  • WCOAS, UCSD, October 2015.
  • Kyoto Operator Algebra Seminar, RIMS, October 2015.
  • Colloquium, Kyushu University, November 2015.
  • Measured group theory, ESI, February 2016.
  • Nordic Congress of Mathematics, Stockholm, March 2016.
  • Seminar, École Normale Supérieure, April 2016.
  • COSy, CRM, June 2016. (3 hours)
  • Pacific RIM Conference on Mathematics 2016, Seoul National University, June 2016.
  • MSJ-SI: Operator Algebras and Mathematical Physics, Tohoku University, August 2016. (3 hours)
• A continuum of C*-norms on B(H) \otimes B(H) and related tensor products
  • Workshop Classification and set theory, Mittag-Leffler Institute, March 2016.
• A remark on fullness of some group measure space von Neumann algebras
  • Séminaire d'Algèbres d'Opérateurs, Paris 7, April 2016.
  • Workshop Classification and dynamical systems II: Von Neumann Algebras, Mittag-Leffler Institute, April 2016.
  • NCGOA, Hausdorff Research Institute for Mathematics, May 2016.
• Finite-dimensional representations constructed from random walks (Slides.pdf)
  • Amenability of discrete groups, AIM, September 2016.
  • Operator Algebra Seminar, University of Tokyo, November 2016.
  • Non-positive curvature group actions and cohomology, Newton Institute, March 2017.
  • Special Week on Operator Algebras, Research Center for Operator Algebras (Shanghai), June 2017.
  • Von Neumann algebras and measured group theory, Institut Henri Poincaré, July 2017.
  • Seminar "Groups, Actions and von Neumann algebras", Université Paris-Sud, September 2017.
  • Ergodic and Geometric Group theory in Sendai (EGGS), Tohoku University, October 2017.
  • Annual Meeting on Operator Theory and Operator Algebra Theory, Ritsumeikan University, November 2017.
  • Operator Algebras and its Application, IPM (Tehran), February 2018. (4 hours)
  • 2018 Spring Probability Workshop, Taipei, June 2018.
• Minicourse on Connes's Embedding Problem and its equivalent (A note on Slofstra's work)
  • Analysis in Quantum Information Theory, IHP, September & October 2017. (12 hours)
  • Winter school on Connes' embedding problem and quantum information theory, University of Oslo, January 2019. (4 hours).
• Kazhdan's property (T) and semidefinite programming (slides.pdf)
  • Kyoto Operator Algebra Seminar, RIMS, November 2017.
  • Operator Algebra Seminar, University of Tokyo, December 2017.
  • Colloquium, UCLA, January 2018.
  • Classification of group von Neumann algebras, AIM, January 2018.
  • Approximation Properties in Operator Algebras and Ergodic Theory, IPAM, April 2018.
  • Interactions between Operator Space Theory and Quantum Probability with Applications to Quantum Information, MFO, May 2018.
  • RIMS-IMI colloquium, RIMS, January 2019.
  • Operator Algebras, Groups and Applications to Quantum Information, ICMAT (Madrid), June 2019.
  • Conference: SYM 10 Years Old, University of Copenhagen, June 2019.
  • Geometry and Approximation, TU Dresden, August 2019.
  • Oka Symposium, Nara Women's University, November 2019.
  • Groups, Dynamics, and Approximation, MFO, December 2019.
  • Geometry Symposium, Zoom, September 2020.
  • Colloquim, Princeton University (Zoom), February 2021.
  • KTGU workshop, Kyoto University (Zoom), February 2021.
• Full factors and co-amenable inclusions (slides.pdf)
  • C*-Algebras, MFO, August 2019.
  • Functional Analysis Seminar, UCLA (Zoom), June 2020.
• Connes's Embedding Conjecture and Quantum Information Theory
  • QIT seminar, Yukawa Institute for Theoretical Physics, May 2020.
• An entropic proof of cutoff on Ramanujan graphs (slides.pdf)
  • Tokyo-Kyoto Joint Operator Algebra Seminar, Zoom, October 2020.
  • Wales MPPM Seminar, Zoom, October 2020.
• (Non-normal) Conditional expectations in von Neumann algebras (slides.pdf)
  • Operator Algebras and Applications (Takesaki 88), online, August 2021.