AMS Sectional Meeting, Invited address, March 2015.
MINT Lectures, Tel Aviv University, January 2015.
Seoul ICM 2014, Invited lecture Lie Theory/ Dynamical Systems sections, August 2014.
Analytic Group Theory, UT Austin, Apr 2025.
Symposium, Weizmann Institute, June 2024.
ICERM, Dynamics, Rigidity and Arithmetic in Hyperbolic Geometry, Providence, May 2023.
von Neumann algebras and geometric group theory, UCSD, San Diego, Feb 2023.
UT graduate school in Groups and Dynamics, UT Austin, Austin, July 2022.
Global Rigidity of actions by higher-rank groups, AIM, San Jose, May 2022.
Joram Seminar Day, Hebrew University, Jerusalem, June 2021.
Measurable, Borel, and Topological Dynamics, CIRM, Luminy, France, October 2019.
Math Dept Colloquium, Ohio State U, Columbus, April 2019.
Math Dept Colloquium, Vanderbilt U, Nashville, February 2019.
Boundaries of topological groups with applications to Lyapounov exponents, symmetric spaces, and C*-algebras, TSIMF, Sanya, December 2018.
Algebra, Geometry, Dynamics, and Applications, Bar-Ilan University, June 2018.
Dynamics and Geometric group theory, AMS, Vanderbilt, April 2018.
Classification of group von Neumann algebras, AIM, January 2018.
Classical and quantum motion in disordered environment, Queen Mary University of London, December 2017.
IUPUI, Midwest Dynamical Systems, October 2016.
Utah, Wasatch Topology Conference, August 2016.
Ben Gurion University, Polish groups School, May 2016.
Purdue University, Colloquium, February 2016.
Penn State University, Center for Dynamics and Geometry Colloquium, November 2015.
UC San Diego, Colloquium, November 2015.
Atkin Memorial Workshop, UIC, May 2015.
Indiana University, Colloquium, Bloomington, IN, February 2015.
Stanford University, Colloquium, Palo Alto, CA, January 2015.
Northwestern University, Colloquium, Evanston, IL, January 2015.
Yale University, Colloquium, New Haven, CT, March 2014.
Vanderbilt University, Colloquium, Nashville, TN, February 2014.
Hebrew University, Homogeneous Dynamics, Unipotent flows, and applications, Jerusalem, Israel, October 2013.
UIUC, Colloquium, Urbana-Champaign, IL, October 2012.
The Technion, Minerva summer school on flows on homogeneous spaces, Haifa, September 2012
The Hebrew University, Colloquium, Jerusalem, June 2012.
Geometric Group Theory on the Gulf, Pensacola, Florida, April 2012.
Bloomington Geometry Workshop, Indiana University, Bloomington, IN, April 2012.
McGill and Universite de Montreal, Colloquium, Montreal, November 2011.
IHP, Geometric and measured group theory, Paris, July 2011.
Ben Gurion University, Ergodic Theorems, Group Actions and Applications, Eilat campus, Israel, May 2011.
Northwestern University, Discrete Methods in Ergodic Theory, Evanston, February 2011.
AMS, Special session on rigidity, Notre Dame, November 2010.
Northwestern University, Midwest Dynamics Conference, Evanston, October 2010.
AMS, Special Session on Rigidity in von Neumann Algebras and Ergodic Theory, UCLA, Oct 2010.
UIC, Workshop in Dynamics, Chicago, May 2010.
The Technion, Colloquium, Haifa, Israel, December 2009.
Affine Isometric Actions of Discrete Groups, Ascona, Switzerland, June 2009.
UCLA, Ergodic Theory and von Neumann Algebras, UCLA, March 2009.
Ohio State U, Equidistribution on homogeneous spaces, Columbus, OH, June 2008.
Brandeis-Harvard-MIT-Northeastern, Colloquium, Boston, February 2008.
Hebrew University, Colloquium, Jerusalem, December 2007.
UC Irvine, Colloquium, Irvine, December 2007.
Caltech, Colloquium, Los Angeles, November 2007.
UCLA, Colloquium, Los Angeles, November 2007.
USC, Colloquium, Los Angeles, November 2007.
Yale, Colloquium , New Haven, October 2007.
U Chicago, Geometry, Rigidity, and Group Actions, (in honor of Robert J. Zimmer's 60th Birthday), Chicago, September 2007.
Moscow Independent University, "Globus", May 2007.
UCLA, von Neumann Algebras and Ergodic Theory, UCLA, March 2007.
AMS, Joint Meeting, New Orleans, January 2007.
Tel-Aviv University, Colloquium, January 2007.
UCLA, Beyond Amenability: groups, actions, and operator algebras, May 2006.
BIRS (Banff, Canada), Rigidity, Group Actions and Dynamics , July 2005.
NCGOA, Vanderbilt, Non commutative Geometry and Operator Algebras , May 2005.
AMS 2005 Spring Central Section Meeting, April 2005.
Universite de Lille, Analysis and Geometry on Random Structures, May 2004
Washington U, St Louis, Midwest Geometry, June 2003.
Moscow Independent University, "Globus", December 2004.
Vanderbilt Non commutative Geometry seminar, November 2004.
Indiana , Colloquium, February 2003.
UCLA, Colloquium , February 2003.
Rutgers, Colloquium , October 2002.
ENS, Lyon, Seminaire de mathematiques pures, July 2002.
ETHZ (Zurich), Advances in Rigidity Theory, June 2002.
MFO, Oberwolfach, Geometrization of Kazhdan's property (T), July 2001.
ESI, Vienna, Random Walks and Geometry, July 2001.
IMU Conference on Dynamics (Jerusalem), celebrating Benjamin Weiss' 60-th birthday, June 2001.
MFO (Oberwolfach), Geometric Rigidity and Hyperbolic Dynamics, February 2001.
Tufts University, Colloquium, September 2001.
Neuchatel, Switzerland, Special colloquium , May 2001.
Newton Institute (Cambridge, UK), Rigidity in Dynamics and Geometry, March 2000.
Penn State, Workshop on Dynamical Systems and Related Topics, October 1999.
UIC, Colloquium, February 1999.
Paris VI, Rigidity, Representations and Ergodic Theory, June 1998.
Stanford, Special Colloquium, March 1998.
Penn State, Workshop on Dynamical Systems and Related Topics, October 1997.
University of Rennes, Conference on Actions of Groups and Probability, July 1997.
Technion (Haifa, Israel), Conference on Modern Ergodic Theorems, March 1997.
Ben Gurion U, Colloquium, Beer Sheva, Israel, March 1997.
Penn State, Workshop on Dynamical Systems and Related Topics, October 1996.
TIFR (Mumbai, India), International Colloquium on Ergodic Theory and Lie Groups,.
Penn State, Workshop on Dynamical Systems and Related Topics, October 1995.
Hebrew University (Jerusalem), Workshop on Lie Groups and Ergodic Theory, May 1995.
Random and Geometric structures in Topology Workshop, MSRI, July 2019.
Ergodic Geometry, TIFR, Mumbai, India, March 2019.
Rigidity Phenomena via Ergodic Theory, University of Utah, August 2017.
Rigidity and Arithmeticity, Lunts Seminar, Moscow, July 2017.
Northwestern Spring school, Super-rigidity, Evanston, April 2017.
Hyperbolic Geometry and Dynamics, HSE, Moscow, May 2016.
Geometric Group Theory, MSRI, June 2015.
Boundaries and Dynamics, Notre Dame University, June 2015.
Non-commutative Geometry and Operator Algebras, Vanderbilt University, May 2015.
Geometric and Analytic Group Theory, Ventotene, Italy, September 2013.
KIAS, Summer school on Homogeneous Dynamics, Seoul, Korea, July 2013.
Geometric Groups on the Gulf Coast, Pensacola, FL, April 2012.
IHP, Von Neumann algebras and ergodic theory of group actions, Superrigidity and Measure Equivalence, Paris, June 2011.
Midrasha Mathematicae, Orbit Equivalence and Rigidity, Hebrew University, Jerusalem, December 2008.
Ecole Polytechnique, Aspects of rigidity, Paris, March 2008.
Les Diablerets, Groups and Dynamics, March, 2008.
IHP, Paris, Groupoids in operator algebras and Noncommutative Geometry, February 2007.
Fukuoka, Rigidity School, Fukuoka, Japan, June 2007.
Geometry Seminar, Paris-Saclay, France, Mar 2025.
Dynamics seminar, Paris-Saclay, France, Mar 2025.
Dynamics seminar, Tel Aviv University, Israel, Nov 2024.
Weizmann Institute, Geometry seminar, Rehovot, Israel, January 2023.
Weizmann Institute, Geometry seminar, Rehovot, Israel, October 2022.
University of Chicago, Chicago Action Now! rotating seminar, November 2016.
Weizmann Institute, Geometry seminar, Rehovot, Israel, December 2015.
Penn State University, Dynamical Systems seminar, State College, PA, November 2015.
Yale University, Geometry seminar, New Haven, CT, October 2015.
Yale University, Geometry and topology seminar, New Haven, CT, March 2014.
Vanderbilt University, Group theory seminar , Nashville, TN, February 2014.
U Chicago, Dynamics Seminar, November 2013.
UIC, Geometry/Topology/Dynamics Seminar, October 2013.
UIUC, Group Theory seminar, Urbana-Champaign, IL, October 2012.
Ben Gurion University, Action Now Seminar, Beer Sheva, June 2012.
Ben Gurion University, Action Now Seminar, Beer Sheva, December 2011.
The Technion, Analysis Seminar, Haifa, December 2011.
U Chicago, Geometry/Topology Seminar, Chicago, February 2011.
The Technion, Special seminar talk, Haifa, Israel, December 2010.
Steklov Mathematical Institute, Dynamics Seminar, Moscow, Russia, December 2010.
McGill U, Analysis Seminar, Montreal, Canada, November 2009.
Northwestern University, Dynamical Systems Seminar, Evanston, October 2009.
Vanderbilt, Topology and Group Theory Seminar, Nashville, October 2009.
Tel Aviv U, Geometry and Dynamics Seminar, Tel-Aviv, Israel, December 2008.
McGill U, joint Analysis and Groups Seminar, Montreal, Canada, November 2008.
Hebrew U, Group Actions Seminar, Jerusalem, Israel, December 2007.
Technion, Actions Now: rotating seminar, Haifa, December 2007.
Ohio State U, Ergodic Theory Seminar, Columbus, November 2007.
Brown, Group actions Seminar, October 2007.
Brown, Geometry, Topology Seminar, October 2007.
U Chicago, Geometry, Topology Seminar, October 2007.
Yale, Group Actions: Dynamics, Geometry, Invariants, New Haven, October 2007.
Hebrew University Lie Groups Seminar , Jerusalem, Israel, June 2007.
U Chicago, Global Dynamics Seminar , April 2007.
Michigan Geometry Seminar, Ann Arbor, March 2007.
Hebrew University Ergodic Theory Seminar, Jerusalem, January 2007.
Hebrew University Lie Groups Seminar, Jerusalem, January 2007.
IAS Lie Groups, Representations and Discrete Mathematics, Princeton, April 2006.
UCLA, Functional Analysis Seminar, Los Angeles, March 2006.
U Chicago, Topology/Geometry Seminar, Chicago, April 2005.
Northwestern U, Dynamics Seminar, Evanston, March 2005.
UIUC, Differential geometry Seminar, Urbana-Champaign, October 2003.
UCLA, Functional Analysis Seminar, Los Angeles, February 2003.
Michigan Lie Groups and Dynamics Seminar, Ann Arbor, March 2002.
Michigan , Geometry Seminar, Ann Arbor, March 2002.
Tufts-Brandeis-MIT, Dynamical Systems seminar, September 2001.
Princeton, Ergodic theory and Statistical Mechanics Seminar, April 2001.
Hebrew U (Jerusalem), Lie groups seminar , January 2001.
Yale, Geometry and Dynamics Seminar, November 2000.
Northwestern, Geometry and Dynamics seminar, November 2000.
Hebrew U (Jerusalem), Lie groups seminar, November 2000.
Max Plank (Leipzig), Geometry seminar, July 2000.
Hebrew U (Jerusalem), Lie groups seminar, December 1999.
Institute Fourier (Grenoble), Geometry seminar, July 1999.
ETH (Zurich), Geometry and group theory seminar, July 1999.
Hebrew U (Jerusalem), Ergodic Theory seminar, July 1999.
Michigan U (Ann Arbor), Geometry seminar, April 1999.
Michigan U (Ann Arbor), Lie groupos and Dynamics seminar, April 1999.
Bielefeld U (Germany), Group Theory Seminar, September 1998.
U Chicago, Topology/Geometry Seminar, April 1998.
Berkeley, Special talk, March 1998.
UIUC (Urbana-Champaign), Analysis Seminar, February 1997.
UIC, Geometry/Topology/Dynamics Seminar, December 1996.
Northwestern (Evanston), Dynamical Systems Seminar, October 1996.
Technion (Haifa), Geometry Seminar, October 1995.
Stanford, Ergodic Theory Seminar, October 1995.
U Chicago, Geometry/Topology Seminar, October 1995.