Home List of Talks

List of talks- July 4, 2008, Generalization of Kazhdan's Property (T) and Kazhdan constant of SL(n,R), Rigidity School Kyoto, Heartpia Kyoto, Japan
- June 3, 2009, A fixed point property and the second bounded cohomology of universal lattices on Banach spaces, Lp-cohomology and Affine Actions on Lp spaces, MAPMO, France
- June 8, 2009, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, Noncommutative Lp Spaces, Operator Spaces and Applications, CIRM, France
- June 30, 2009, A fixed point property and the second bounded cohomology of universal lattices, Affine Isometric Actions of Discrete Groups, CSF (ETH Zurich), Switzerland
- December 17, 2009, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, New Directions in Geometric Group Theory, University of Queensland, Australia
- December 23, 2009, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, Geometry and Analysis, Paris, France
- June 15, 2010, Fixed-point and Kazhdan-type theorems for universal lattices on Banach spaces, Workshop AGORA (Actions, Groups, OpeRator Algebras), Ecole Normale Superieure, Lyon, France
- July 13, 2010, Fixed-point and Kazhdan-type theorems for universal lattice on Banach spaces, Non-commutative Harmonic Analysis, Bedlewo, Poland
- August 9, 2010, Rigidity theorems for non-arithmetic matrix groups, Workshop on Geometric Group Theory: Satellite Conference to ICM 2010 (Contributed Talk), Goa, India
- March 6, 2011, Property (TT)/T and homomorphism rigidity into mapping class groups, Rigidity School Nara, Nara, Japan
- March 17, 2011, Property (TT)/T and homomorphism rigidity into mapping class groups, Geometry and Analysis, University of Kyoto, Japan
- June 21, 2011, Property (TT)/T and homomorphism superrigidity into mapping class groups, Geometric Group Theory, University of Bristol, United Kingdoms
- August 18, 2011, Property (TT)/T and homomorphism superrigidity into mapping class groups, Geometric Group Theory and Logic: The Elementary Theory of Groups, the University of Illinois at Chicago, United States of America
- October 18, 2011, Property (TT)/T and homomorphism superrigidity into mapping class groups, Todai Forum 2011 "Geometry and Dynamics", ENS Lyon, France
- June 8, 2012, Property (TT)/T and homomorphism superrigidity into mapping class groups and into Out(F_n) (short talk), Geometric Group Theory - Kyoto 2012 , RIMS, Japan
- July 27, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, The Conference on Group Actions and Applications in Geometry, Topology and Analysis, Kunming University of Science and Technology, China
- August 21, 2012, Rigidity reults related to mapping class groups, The Fourth Geometry Meeting dedicated to the centenary of A.D.Alexandrov, the Euler International Mathematical Institute, Russia
- January 21, 2013, Banach spectral gap of finite graphs, Discrete Geometry and Dynamical Systems, Kyoto University, Japan
- February 20, 2013, Property (TT)/T and homomorphism superrigidity into mapping class groups I, Special Program on Teichmuller Theory, the Erwin Schrodinger Institute, Austria
- February 20, 2013, Property (TT)/T and homomorphism superrigidity into mapping class groups II, Special Program on Teichmuller Theory, the Erwin Schrodinger Institute, Austria
- July 17, 2013, Sphere equivalence and Banach expanders, Summer School on Non-commutative Geometry and Operator Algebras, Shanghai, China
- August 8, 2013, Extraplolation of banach spactral gaps, Geometry and Probability, Kyoto University, Japan
- November 30, 2013, Multi-way isoperimetries and imprimitive actions on graphs， The Second Workshop on Spectral Graph Theory and Related Topics, Tohoku University, Japan
- December 12, 2013, Group approximation in Cayley topology and coarse geometry: Coarse embeddings of amenable groups，Metric geometry and analysis，Kyoto University, Japan
- June 9, 2014, Group approximation in Cayley topology and coarse geometry, part II: fibered coarse embeddings, International Conference on Banach methods in Noncommutative Geometry, Wuhan University, China
- July 23, 2014, Group approximation in Cayley topology and coarse geometry, Geometric and Asymptotic Group Theory with Applications 8 (GAGTA8), University of Newcastle, Australia
- August 10, 2014, Group approximation in Cayley topology and coarse geometry,
**ICM satellite conference**``Geometry on Groups and Spaces" (**plenatry talk**), KAIST, Korea - August 14, 2014, Group approximation in Cayley topology and coarse geometry, ICM, Seoul 2014 (contributed talk (15-min talk)), COEX, Korea
- October 31, 2014, Group approximation in Cayley topology and coarse geometry: Fibered corse embeddings, Conference on Geometric Functional Analysis and its Applications, Universite de Franche-Comte, France
- November 4, 2014, Poincare type inequalities and non-embeddabilities: Gross trick and sphere equivalence I, Fall school ``Metric Embeddings : Constructions and Obstructions", Institute Henri Poincare, France
- November 5, 2014, Poincare type inequalities and non-embeddabilities: Gross trick and sphere equivalence II, Fall school ``Metric Embeddings : Constructions and Obstructions", Institute Henri Poincare, France
- November 24, 2014, Metric Kazhdan constants, Rigidity School Tokyo 2014 (2nd), University of Tokyo, Japan
- January 10, 2015, Verifiable expander, Topics in Differential Geometry and its Discretizations, Tohoku University, Japan
- April 18, 2015, Local-global phenomenon of graph spectral gaps, Mini-workshop ``Frontiers in Mathematical Sciences", Tohoku University, Japan
- November 23, 2015, Strong algebraization of fixed point property, Rigidity School Tokyo 2015, University of Tokyo, Japan
- May 22, 2016, Multi-way expanders and imprimitive group actions on graphs, Mini Symposium "Spectral Graph Theory and Related Topics" in JCCA 2016 (Japanese Conference on Combinatorics and its Applications), Kyoto University, Japan
- June 23, 2016, Strong algebraization of fixed point property, Topology and Analysis of Discrete Groups and Hyperbolic Spaces, Kyoto University, Japan
- July 5, 2016, Strong algebraization of fixed point property, Metric spaces: Analysis, Embeddings into Banach Spaces, Applications, Texas A&M University, USA
- July 26, 2016, Synthesis in Property (T): The Part and the Whole 1, Rigidity School 2016, Nagoya University, Japan
- July 26, 2016, Synthesis in Property (T): The Part and the Whole 2, Rigidity School 2016, Nagoya University, Japan
- July 27, 2016, Synthesis in Property (T): The Part and the Whole 3, Rigidity School 2016, Nagoya University, Japan
- July 27, 2016, Synthesis in Property (T): The Part and the Whole 4, Rigidity School 2016, Nagoya University, Japan
- December 8, 2016, Superintrinsic synthesis in fixed point properties, Amenability, coarse embeddability and fixed point properties, MSRI, USA

- October 25, 2007, An invitation to expander graphs, Operator Algebra Seminar, University of Tokyo, Japan
- January 30, 2008, A generalization of property (T) of SL(n,R), Operator Algebra Seminar, University of Tokyo, Japan
- June 12, 2008, On Lubotzky's property (tau) and expander graphs, Operator Algebra Seminar, University of Tokyo, Japan
- September 19, 2008, On generalization of Kazhdan's property (T), Junior Workshops on Functional Analysis, Kusatsu Seminar House, Japan
- September 27, 2008, Generalization of Kazhdan's Property (T) and Kazhdan constant of SL(n,R) (15-minute talk), Autumn Meeting of the Mathematical Society of Japan, Tokyo institute of Technology, Japan
- May 7, 2009, A fixed point property and the Kazhdan property of SL(n,Z[X1 , ... ,Xk]) for Banach spaces, Operator Algebra Seminar, University of Tokyo, Japan
- July 9, 2009, Boundedness properties with respect to quasi-affine actions of universal lattices on Banach spaces, Rigidity Seminar, Nagoya University, Japan
- September 3, 2009, Boundedness properties with respect to quasi-affine actions of SL(n,Z[X1 , ... ,Xk]) on Banach spaces, Studies on Operator Algebra and Related Fields, RIMS, Japan
- September 6, 2009, On generalization of Kazhdan's property (T) II, Junior Meeting on Functional Analysis, Ritsumeikan University, Japan
- December 3, 2009, Vanishing of quasi-homomorphisms and the stable commutator lengths on special linear groups over euclidean rings, Operator Algebra Seminar, University of Tokyo, Japan
- December 9, 2009, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, Max Dehn Seminar, Tohoku University, Japan
- March 4, 2010, Fixed point properties for universal lattices on Banach spaces, Geometry and Ergodic Theory Seminar, EPFL, Switzerland
- March 29, 2010, Fixed point properties and bounded cohomology for universal lattices on Banach spaces, Seminaire "Groupes et algebres d'operateurs", Universite de Neuchatel, Switzerland
- April 22, 2010, On quasi-homomorphisms and commutators in the special linear group over a Euclidean ring, Geometry and Ergodic Theory Seminar, EPFL, Switzerland
- April 28, 2010, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, Geometry Seminar, ETH Zurich, Switzerland
- June 12, 2010, SCL, Week-end mathematique, St-Denis de l’Hotel, Orleans, France
- September 9, 2010, Fixed point properties and second bounded cohomology of universal lattices on Banach spaces, Operator Algebra Seminar, University of Rome "Tor Vergata", Italy
- October 6, 2010, On quasi-homomorphisms and commutators in SLn(A) (A: ring), Seminaire d'Analyse et Geometrie, Institut de Mathematiques de Jussieu (Chevaleret), France
- October 7, 2010, Fixed-point property for universal lattices on Banach spaces, Seminaire d'Algebres d'Operateurs, Institut de Mathematiques de Jussieu (Chevaleret), France
- October 11, 2010, Rigidity for non-arithmetic matrix groups, Seminaire de Theorie Ergodique, Universite de Rennes I, France
- October 19, 2010, On quasi-homomorphisms and commutators in SLn(A) (A: ring), Seminaire "Groupes et Geometrie", Universite de Geneve, Switzerland
- October 27, 2010, On quasi-homomorphisms and commutators in SLn(A) (A: ring), Oberseminar Geometrie, Universite de Fribourg, Switzerland
- October 28, 2010, Quasi-cocycles and homomorphism rigidity to mapping class groups, Geometry and Ergodic Theory Seminar, EPFL, Switzerland
- Nonember 5, 2010, Quasi-cocycles and homomorphism rigidity to mapping class groups, Seminaire "Groupes et algebres d'operateurs", Universite de Neuchatel, Switzerland
- November 24, 2010, On quasi-homomorphisms and commutators in SLn(A) (A: ring), Geometry seminar, ETH Zurich, Switzerland
- January 20, 2011, Property (TT)/T and homomorphism rigidity into Out(F_n), Operator algebra seminar, University of Tokyo, Japan
- January 31, 2011, Property (TT)/T for groups, and homomorphisms into mapping class groups, Researches of symmetries in operator algebras, RIMS, Japan
- April 18, 2011, Property (TT)/T and homomorphism superrigidity into mapping class groups, Keio geometry seminar, Keio University, Japan
- August 5, 2011, Rigidity Theorems for Non-arithmetic Matrix Groups, Big^2 seminar, Tokyo Institute of Technology, Japan
- August 28, 2011, Rigidity theorems for non-arithmetic matrix groups, 58th Geometry Symposium, Yamaguchi University, Japan
- September 5, 2011, Property (TT)/T and homomorphism superrigidity to mapping class groups, Topology on Riemann Surfaces 2011, the University of Tokyo, Japan
- September 12, 2011, On bounded cohomology, Junior Meeting on Functional Analysis, Kansai Seminar House, Japan
- October 28, 2011, Property (TT)/T and homomorphism superrigidity to mapping class groups, Geometry seminar, Kyushu University, Japan
- December 13, 2011, On Kazhdan's property (T) and its strengthenings I, Analysis and Geometry of Discrete Groups and Hyperbolic Spaces, RIMS

(this is the first part of 3 lectures of an introductory mini-course on property (T) which I gave at that conference) - December 14, 2011, On Kazhdan's property (T) and its strengthenings II, Analysis and Geometry of Discrete Groups and Hyperbolic Spaces, RIMS
- December 15, 2011, On Kazhdan's property (T) and its strengthenings III, Analysis and Geometry of Discrete Groups and Hyperbolic Spaces, RIMS
- February 21, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Tuesday seminar on Topology, University of Tokyo
- March 14, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Group actions and K-theory, Univeristy of Kyoto
- March 26, 2012, On quasi-homomorphisms and commutators in SLn(A) (A:ring) （15-minute talk）, MSJ Spring Meeting 2012, Tokyo University of Science
- March 28, 2012, Kazhdan's property (T) and (F_Lp) for universal latices （10-minute talk）, MSJ Spring Meeting 2012, Tokyo University of Science
- March 28, 2012, Second bouneded cohomology of universal lattices with twisted unitary coefficients （10-minute talk）, MSJ Spring Meeting 2012, Tokyo University of Science
- March 28, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups （10-minute talk), MSJ Spring Meeting 2012,Tokyo University of Science
- May 23, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Seminaire d’Analyse Fonctionnelle, Universite de Franche-Comte, France
- June 12, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Seminar Geometry and Analysis on Groups, Univeristy of Vienna, Austria
- June 14, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Seminaire Geometrie et Systemes Dynamiques, Universite de Bourgogne, France
- September, 10, 2012, p-Kazhdan constants and non-expanders, Seminaire "Groupes et algebres d'operateurs", Universite de Neuchatel, Switzerland
- October, 10, 2012, p-Kazhdan constants and non-expanders, Operator Theory and Operator Algebra Seminar, Tohoku, Univeristy, Japan
- October, 17, 2012, p-Kazhdan constants and non-expanders, Geometry Colloquim, University of Tokyo, Japan
- October, 26, 2012, p-Kazhdan constants and non-expanders, Kansai Operator Algebra Seminar, Kyoto University, Japan
- December, 5, 2012, Property (TT)/T and homomorphism superrigidity to mapping class groups, Topology Seminar, Tokyo Institute of Technology, Japan
- December, 10, 2012, Rigidity Theorems for non-arithmetic matrix groups, Colloquim, Tohoku Univeristy, Japan
- December, 18, 2012, Homomorphism superrigidity from Chevalley groups over polynomial rings into mapping class groups of surfaces, Algebra Seminar, Tsukuba University, Japan
- March 16, 2013, Expander graphs and multi-way isoperimetries (1), Study group on metrci geometry, Biwa-lake conference center, Japan
- March 17, 2013, Expander graphs and multi-way isoperimetries (2), Study group on metrci geometry, Biwa-lake conference center, Japan
- March 18, 2013, Expander graphs and multi-way isoperimetries (3), Study group on metrci geometry, Biwa-lake conference center, Japan
- March 18, 2013, Expander graphs and multi-way isoperimetries (4), Study group on metrci geometry, Biwa-lake conference center, Japan
- March 19, 2013, Expander graphs and multi-way isoperimetries (5), Study group on metrci geometry, Biwa-lake conference center, Japan
- April 9, 2013, Property (TT)/T and homomorphism superrigidity into mapping class groups, Geometry Seminar, Tohoku University, Japan
- May 17, 2013, Universal inequalities on multi-way isoperimetries of finite Cayley graphs, Combinatorics Seminar, Tohoku University, Japan
- May 23, 2013, Multi-wa isoperimetries, expanders and finite Cayley graphs, Kyoto Operator Algebra Seminar, Kyoto University, Japan
- June 14, 2013, Multi-wa isoperimetries, expanders and finite Cayley graphs, Discerete mathematics seminar, Yamagata University, Japan
- June 21, 2013, Uniform structures of Banach spaces and extrapolation of Banach spectral gaps, Combinatorics Seminar, Tohoku University, Japan
- June 28, 2013, Cayley topology and coarse embeddings of amenable groups, Part II, Rigidity seminar, Nagoya University, Japan
- July 1, 2013, Multi-wa isoperimetries, expanders and finite Cayley graphs, Differential geometry and topology seminar, Keio University, Japan
- July 11, 2013, Banach spectral gaps of finite graphs I: Expanders and Kazhdan-type constants, Operator algebra research center seminar, East China Normal University, China
- July 11, 2013, Banach spectral gaps of finite graphs II: Large scale geometry, Operator algebra research center seminar, East China Normal University, China
- August 24, 2013, Universal ineualities on multi-way isoperimetries of finite Cayley graphs and symmetries, the 60th Geometry Symposium, Tokyo Insititute of Technology, Japan
- September 11, 2013, Expanders and coarse embeddings (1)，Geometry conference in Aso，Aso, Japan
- September 11, 2013, Expanders and coarse embeddings (2)，Geometry conference in Aso，Aso, Japan
- November 21, 2013, Gaps between multi-way isoperimetries and imprimitive group actions on graphs， Diffrential equations on manifolds，Kanazawa University, Japan
- January 14, 2014, Group approximation in Cayley topology and coarse geometry，Topology and Geometry seminar，Hiroshima University, Japan
- February 11, 2014, Group approximation in Cayley topology and coarse geometry, Seminaire de Mathematiques Pures,Universite Blaise Pascal, France
- February 18, 2014, Group approximation in Cayley topology and coarse geometry，Student Seminar，Institut Henri Poincare，France
- March 5, 2014, Group approximation in Cayley topology and coarse geometry，Seminaire Analyse et Geometrie，Paris VII，France
- March 15, 2014, Sphere equivalence, Banach expanders, and extrapolation (12-min talk), MSJ Spring Meeting 2014, Gakushu-in University, Japan
- March 15, 2014, Multi-way expanders and imprimitive actions on graphs (12-min talk), MSJ Spring Meeting 2014, Gakushu-in University, Japan
- March 17, 2014, Group approximations in Cayley topology and coarse geometry, part II: fibered coarse embeddings (15-min talk), MSJ Spring Meeting 2015, Gakushu-in University, Japan
- April 15, 2014, Group approximation in Cayley topology and coarse geometry, Part I: coarse embeddings of amenable groups, Geometry seminar, Tohoku University, Japan
- June 19, 2014, Multi-way expanders and imprimitive actions on graphs, 31st Algebraic combinatorics Symposium, Tohoku University, Japan
- July 5, 2014, An invitation to expander graphs: crossover with Geometric Group Theory, Osaka Combinatorics seminar, Osaka, Japan
- August 25, 2014, Metric Kazhdan constants, Geometry Symposium, Meijo University, Japan
- September 4, 2014, Multi-way expanders and imprimitive actions on graphs, COS 14, Yuda, Japan
- September 19, 2014, Cayley verifiable expander, Geomerty conference in Aso , Aso, Japan
- October 8, 2014, Group approximation in Cayley topology and coarse geometry, Hiroshima Geometry conference, Hiroshima University, Japan
- November 21, 2014, metric Kazhdan constants I, Differential equations on manifolds, Kanazawa, Japan
- November 21, 2014, metric Kazhdan constants II, Differential equations on manifolds, Kanazawa, Japan
- December 3, 2014, Verifiable expanders and metric Kazhdan constants, Differential Geometry seminar, Osaka City University, Japan
- December 5, 2014, Verifiable expanders and metric Kazhdan constants, Combinatorics seminar, Tohoku University, Japan
- January 24, 2015, Verifiable expander, Awaji Geometry meeting 2015, Awaji, Japan
- February 2, 2015, Metric Kazhdan constants etc.1, Study meeting on Geometric Group Theory, Izu, Japan
- February 2, 2015, Metric Kazhdan constants etc.2, Study meeting on Geometric Group Theory, Izu, Japan
- February 3, 2015, Metric Kazhdan constants etc.3, Study meeting on Geometric Group Theory, Izu, Japan
- February 18, 2015, New algebraization of Kazhdan and fixed point properties, Kagoshima Algebra-Analysis-Geometry seminar, Kagoshima University, Japan
- March 14, 2015, An invitation to expander graphs, The Third Workshop on Spectral Graph Theory and Related Topics, Hiroshima Institute of Technology, Japan
- March 21, 2015, Cayley verifiable expander (15-minute talk), MSJ spring meeting 2015, Meiji University, 2015
- March 24, 2015, Group approximations in Cayley topology and coarse geometry: part II: Fibered coarse embedding (15-minute talk), MSJ spring meeting 2015, Meiji University, 2015
- April 14, 2015, New algebraization of Kazhdan and fixed point propertires, Differential Topology seminar, Kyoto University, Japan
- April 21, 2015, New algebraization of Kazhdan and fixed point propertires, Geometry smeinar, Tohoku University, Japan
- May 12, 2015, The space of marked groups and metric Kazhdan constants, Topology and Geometry seminar, Hiroshima University, Japan
- May 14, 2015, Cayley verifiable expander, Hiroshima Combinatorics seminar, Hiroshima University for Technology, Japan
- July 17, 2015, Colored local convergence of diagrams and graph spectral gaps, Yamagata Discrete Mathematics seminar, Yamagata University, Japan
- August 29, 2015, Space of marked groups and coarse geometry of sequences of finite groups, The 62nd Geometry Symposium, Tokyo University of Science, Japan
- September 15, 2015, Stong algebraization of fixed point properties, the Mathematical Society of Japan Autumn Meeting 2015, Kyoto Sangyo University, Japan
- October 19, 2015, Strong algebraization of fixed point property, Keio Differential Geometry and Topology Seminar,Keio University, Japan
- October 30, 2015, Strong algebraization of fixed point property, Geometry Colloqium, Hokkaido University, Japan
- November 10, 2015, Local-to-global rigidity of graph spectral gaps, Probability Seminar, Osaka University, Japan
- November 30, 2015, Fixed point property on Banach spaces: obstraction to Gromov hyperbolicity and strong algebraization, Geometry Seminar, Osaka University, Japan
- December 1, 2015, Strong algebraization of fixed point property, Geometry Seminar, Nagoya University, Japan
- January 20, 2016, Bounded and Unbounded Generations; and Expander Graphs, Algebra Seminar, Ehime University, Japan
- January 24, 2016, Higher rank versus rank 1 via quasi-cocycles, Awaji Geometry Workshop, Keino-Matsubara So, Japan
- January 25, 2016, Strong algebraization of fixed point properties, Some problems in operator algebras related to ergodic theory and group theory, RIMS, Kyoto University, Japan
- February 15, 2016, Strong algebraization of fixed point properties, Operator Algebra and Ergodic Theory Seminar/Geometry Seminar, Kyushu University, Japan
- February 24, 2016, Strong algebraization of fixed point properties, Yurui Seminar, Waseda University, Japan
- March 23, 2016, Strong algebraization of fixed point properties, Geometry and Topology Seminar, Seoul National University, Korea
- May 17, 2016, Strong algebraization of fixed point properties, Topology and Geometry Seminar, Hiroshima University, Japan
- June 28, 2016, Strong algebraization of fixed point properties, Tuesday Topology Seminar, University of Tokyo, Japan
- June 29, 2016, Strong algebraization of fixed point properties, Topology Seminar, Tokyo Institute of Technology, Japan
- Sep 15, 2016, Superintrinsic synthesis in fixed point properties, EGG Seminar, EPFL, Lausanne, Switerland
- Oct 4, 2016, Superintrinsic synthesis in fixed point properties, Seminar "Groups and Geometry", University of Geneva, Switzerland
- Oct 17, 2016, Superintrinsic synthesis in fixed point properties, Oberseminar Geometrie, University of Fribourg, Switzerland
- Oct 19, 2016, Bounded and unbounded generation; and fixed point properties, Mathematical Colloquium, University of Bern, Switzerland
- Nov 30, 2016, Superintrinsic synthesis in fixed point properties, Geometry Seminar, ETZ, Zuerich, Switzerland

- June 6--10, 2016, Kazhdan's property (T) and fixed point property: Old and New, Graduate School of Mathematics, Nagoya University, Japan