Lecture, Workshop: Convergence and Low Regularity in General Relativity, Simons Center for Geometry and Physics, 29 Apr-3 May, 2019.

U. Wien, Austria, 28 Nov - 5 Dec, 2018.

Lecture, Representations of Riemannian Geometry, Philadelphia, 10-13 August, 2017.

Lecture, Non-regular Spacetime Geometry, Firenze, Italy, 20-22 June, 2017.

Lecture, VIII International Meeting on Lorentzian Geometry, Malaga, Spain, 20-23 Sept, 2016.

Lecture, Reflections on Global Riemannian Geometry, Townsend, TN, 18-21 August, 2016.

Berlin Mathematical School Friday Colloquium, Berlin, Germany, 18 July, 2014.

Lecture, Smoky Cascade Geometry Conference, University of Tennessee at Knoxville, 19-21 March, 2014.

Minicourse on Alexandrov Geometry, School on Geometric Analysis on Riemannian and singular metric spaces, Como, Italy, 30 September - 5 October, 2013.

Minicourse on Alexandrov Geometry, School on Metric Geometry, les Diablerets, Switzerland, 25-30 August 2013.

Lecture, Conference on Metric Geometry and Applications, Notre Dame University, March 2013.

Institut Henri Poincare, Research in Paris, France, 3 - 16 June 2012.

Colloquium, NYU Poly, 29 March 2012.

Seminar, Center for Dynamics and Geometry, Pennsylvania State University, 7 December 2011.

Geometry Luncheon Seminar, Pennsylvania State University, 7 December 2011.

Max Planck Institute for Mathematics, Bonn, Germany, 20 - 26 July 2011.

Geometry Seminar, Universite Toulouse III, France, 16 November 2010.

IHES, France, 7-22 November 2010.

Research in Teams (with V. Kapovitch and A. Petrunin), BIRS, Canada, 2-9 May 2010.

Seminar, Center for Dynamics and Geometry, Pennsylvania State University, 7 April 2010.

Geometry Luncheon Seminar, Pennsylvania State University, 7 April 2010.

Lecture, Workshop on Riemannian and Non-Riemannian Geometry, Indiana University Purdue University Indianapolis, 8 August 2009.

Research in Pairs (with A. Petrunin), Oberwolfach Institute, Germany, 12 - 25 July 2009.

Lecture, Conference on Metric Geometry/ Alexandrov Geometry, Beijing, China, 23 - 29 November 2008.

Colloquium, Notre Dame University, Indiana, 26 March 2008.

Seminar, Center for Dynamics and Geometry, Pennsylvania State University, 9 April 2008.

American Mathematical Society Special Session on Differential Geometry and its Applications, Chicago, Illinois, October 2007.

AIM Workshop on Manifolds with Nonnegative Sectional Curvature, Palo Alto, California, September 2007.

Research in Pairs, Oberwolfach Institute, Germany, 1-14 July 2007.

Lecture, Bloomington Geometry Workshop, Indiana University, April 2007.

Lecture, Geometrie Workshop, Oberwolfach Institute, Germany, October 2006.

Lecture, International Conference on Global Differential Geometry, Muenster, Germany, August 2006.

American Mathematical Society Special Session on Differential Geometry, Atlanta, Georgia, January 2005.

Lecture, Workshop on Collapsing and Metric Geometry, Muenster, Germany, August 2004.

Lecture, Differential Geometry Workshop, CUNY Graduate Center, New York, April 2004.

Colloquium, Polytechnic University, Brooklyn, New York, April 2004.

American Mathematical Society Special Session on Convergence of Riemannian Manifolds, Lawrenceville NJ, April 2004.

Seminar, Center for Dynamics and Geometry, Pennsylvania State University, March 2004.

Lecture, Second Russian-German Geometry Meeting, St. Petersburg, Russia, June 2002.

Lecture, Differentialgeometrie im Grossen Workshop, Oberwolfach, Germany, June 2001.

Last updated sept/2017