Invited talks

And when the current beliefs come, in their turn, to look silly, a new set will be invented, so that the immemorial madness may continue to wear its customary mask of legality, idealism, and true religion.

                                                                                                            A. Huxley, The Devils of Loudun (1952)

Conference talks and colloquia
  • The complexity of the classification problem in ergodic theory, Logic In Southern California, March 2018, University of California at Irvine;
  • Noncommutative simplices, Colloquium at Queen's University Belfast, February 2017;
  • Operator systems in quantum information theory and noncommutative Choquet theory, Colloquium at the University of Ottawa, January 2017; 
  • Universal objects and extreme amenability: where topological dynamics meets Ramsey theory, Colloquium at the University of Illinois at Chicago, December 1st, 2016;
  • Polish groupoids and the classification of operator algebraic varieties (slides), 2015 Winter CMS Meeting, Special Session on Descriptive set theory, December 2015;
  • Noncommutative simplices and the mathematics of quantum physics, Oliver Club (Department Colloquium), Cornell University, November 19th, 2015;
  • Polish groupoids and the classification problem for operator algebraic varieties, Logic Seminar, Cornell University, November 2015;
  • Nonstandard methods in combinatorics, Claremont Colleges Colloquium (October 21st, 2015);
  • The noncommutative Poulsen simplex, 2015 West Coast Opeator Algebras Symposium, University of California at San Diego, October 2015;
  • The classification of multiplier algebras of operator algebraic varieties, Colloquium, Universidad Complutense de Madrid, June 2015;
  • The complexity of classification problems in operator algebras, Joint Mathematics Meeting 2015, Special Session on Classification Problems in Operator Algebras -- San Antonio, January 2015;
  • Uniqueness, homogeneity, and universality of the noncommutative Gurarij space (abstract), Canadian Mathematical Society 2014 Winter Meeting, Special Session on Operator Algebras and Operator Theory, December 2014; 
  • Borel complexity and automorphisms of C*-algebras (abstract, slides), Workshop on Set Theory -- Mathematical Research Institute of Oberwolfach, January 2014;

Invited research visits

  • University of Glasgow, October 2-6, 2017 (host: Christian Voigt)
  • University of Houston, July 24-28, 2017 (host: Mehrdad Kalantar)
  • University of Waterloo, December 7-15, 2015 (host: Matthew Kennedy)
  • University College London, August 19-20 and December 16-17 (host: Simone Severini)
  • Instituto de Ciencias Matemáticas, May 26-29, 2015 (host: Jordi Lopez-Abad)
  • University of Copenhagen, April 28 - May 4, 2015 (host: Asger Tornquist)
  • McGill University, January 26-31, 2015 (host: Marcin Sabok)
  • University of Illinois at Chicago, November 17-22, 2014 (host: Isaac Goldbring)
  • Boise State University, April 16-24, 2014 (host: Samuel Coskey)
  • University of Copenhagen, August 25 - September 22, 2013 (host: Asger Tornquist) 
  • Universidade Federal de Santa Catarina, June 9-28, 2013 (host: Daniel Concalves and Vladimir Pestov)
  • University of Vienna, April 15-20, 2012 (host: Goulnara Arzhantseva) 

Invited participation to workshops

  • The classification problem for quantum groups, Banff International Research Station, November 20-27, 2016
  • Heilbronn Focussed Research Meeting "Noncommutative graphs in quantum information theory", October 3-7, 2016 and February 6-10, 2017
  • Spring 2016 AMS Sectional Meeting, April 2016;
  • 2015 West Coast Operator Algebras Seminar, October 10-11, 2015, University of California at San Diego, California, US;
  • Nonstandard methods in number theory, AIM SQuaRE meeting, Palo Alto, California, US;
  • Set Theory, January 13-17, 2014, Mathematical Research Institute of Oberwolfach, Obwerwolfach (Germany);
  • Nonstandard methods in number theory, June 3-7 2013, August 4-8 2014, and June 22-26 2015, AIM SQuaRE meeting, Palo Alto;

Seminar talks
  • The noncommutative Poulsen simplex, Geometry and Analysis Seminar, University of Auckland, June 25, 2018;
  • The complexity of the classification problem in ergodic theory, Functional Analysis Seminar, UCLA, March 7, 2018;
  • Actions of rigid groups on C*-algebras, Analysis Seminar, University of Glasgow, January 12, 2018;
  • The complexity of the classification problem in ergodic theory, Functional Analysis Seminar, University of California at San Diego, November 2, 2017;
  • The complexity of the classification problem in ergodic theory (slides), Analysis Seminar, University of Glasgow, October 3, 2017;
  • The complexity of the classification problem in ergodic theory, Logic Seminar, University of Illinois at Urbana-Champaign, September 12, 2017;
  • Borel complexity and C*-dynamics, Intensive Research Program on Operator Algebras Weekly Seminar, CRM Barcelona, March 29, 2017;
  • Cocycle superrigidity and group actions on C*-algebras, Operator Algebras Seminar, Purdue University, February 23, 2017;
  • A game-theoretic approach to Hjorth's turbulence theory, Logic Seminar, California Institute of Technology (January 17, 2017);
  • Universal objects and extreme amenability: where topological dynamics meets Ramsey theory, Logic Seminar, California Institute of Technology (November 29, 2016);
  • The omitting types theorem and the entropy realization problem, Logic Seminar, University of Turin (July 26, 2016);
  • Weak equivalence and the entropy realization problem, UCLA Functional Analysis Seminar, UCLA (March 2nd, 2016);
  • Weak equivalence for actions on the hyperfinite II_1 factor, UCSD (February 16th, 2016);
  • On the Erdős sumset conjecture, Combinatorics Seminar, Caltech (January 13th, 2016);
  • A functional analytic perspective on the Poulsen simplex, Functional Analysis seminar, University of Waterloo (December 13th, 2015);
  • Fraisse theory and the noncommutative Poulsen simplex, Caltech-UCLA logic seminar (October 9th 2015);
  • Fraïssé theory and universal objects in group theory and metric geometryGeometry and Analysis on Groups Seminar -- University of Vienna (May 6th, 2015);
  • Borel complexity theory and Gromov's program, Geometry and Analysis on Groups Seminar -- University of Vienna (May 5th, 2015);
  • Operator system and operator space analogs of the Cuntz algebra. Operator Algebra Seminar --- University of Copenhagen (April 29th, 2015);
  • Generic spaces of operators, Séminaire de Logique --- Institut Camille Jordan, Lyon (March 31st, 2015);
  • A dichotomy for the complexity of the classification problem of automorphisms of C*-algebras, Descriptive Set Theory Seminar --- Université Paris 6 (February 17th, 2015);
  • Generic spaces of operators, Séminaire Général de Logique -- Université Paris 7 (February 16th, 2015);
  • An invitation to sofic groups, Geometric & Combinatorial Group Theory Seminar -- McGill University, Montreal (January 28th, 2015);
  • Polish groupoids and functorial complexity, Category Seminar -- McGill University, Montreal (January 27th, 2015);
  • The noncommutative Gurarij space (abstract), Logic Seminar -- University of Illinois at Chicago (November 18th, 2014):
  • The noncommutative Gurarij space and other Fraisse limits in functional analysis (abstract), Model Theory Seminar -- McMaster University, Hamilton, Ontario, Canada (October 28th, 2014);
  • Functorial complexity of Polish and analytic groupoidsSet Theory Seminar, Fields Institute (August 1st, 2014);
  • Conjugacy and cocycle conjugacy of automorphisms of O_2 are not Borel (abstract), Operator Algebras Seminar, Fields Institute (April 15th, 20114);
  • Borel complexity and automorphisms of C*-algebras (abstract, slides), Group Actions and Dynamics Seminar, University of Texas at Austin (March 5th, 2014); 
  • Sofic and hyperlinear groups and the logic for metric structures (abstract), Geometry and Analysis on Groups Seminar -- University of Vienna (October 2nd, 2013);
  • The algebraic eigenvalues conjecture for sofic groups (abstract), Operator Algebras Seminar -- University of Copenhagen (September 18th, 2013);
  • Classification of automorphisms of operator algebras up to conjugacy (abstract), Seminar on Set Theory and Applications -- University of Copenhagen, Denmark (September 5th, 2013);
  • The automorphisms of a Jiang-Su stable C*-algebra are not classifiable up to conjugacy (abstract), Operator Algebras Seminar -- Fields Institute (August 8th, 2013);
  • The complexity of the relation of unitary equivalence for automorphisms of separable unital C*-algebras (abstract), Analysis Seminar -- University of Waterloo (October 19th, 2012);
  • The complexity of the relation of unitary equivalence for automorphisms of separable unital C*-algebras (abstract), Operator Algebras Seminar -- Fields Institute (October 16th, 2012);
  • La logica per strutture metriche ed il numero di gruppi sofici e iperlineari universali (abstractslides) -- University of Turin, Italy (June 27th, 2012);
  • Turbulent actions on automorphism groups of C*-algebras (abstract), Operator Algebras Seminar -- Fields Institute (April 12th, 2012);
  • Nonstandard methods and additive combinatorics: effective estimates for Jin's theorem (abstract), Logic Seminars at Pisa -- University of Pisa (April 23rd, 2012);
  • Logic for metric structures and the number of universal sofic and hyperlinear groups (abstract), Set Theory Seminar -- Fields Institute (January 20th, 2012);
  • The Continuum Hypothesis and ultrapowers of C*-algebras and von Neumann algebras, Logic Seminars at Pisa -- University of Pisa (May 31st, 2011);
  • The structure theorem for unitary representations of amenable groups, Logic Seminars at Pisa -- University of Pisa (16th June, 2010).

Other talks and presentations
  • Groupoid Lp operator algebras (abstract, slides), Canadian Annual Symposium on Operator Algebras and Their Applications (June 26th, 2014);
  • An introduction to Fourier analysis and Roth's theorem (slides), AIM SQuaRE preparatory meeting (April 11th, 2013);
  • An introduction to Borel complexity of equivalence relations, University of Virginia, Charlottesville (March 8th, 2013);
  • Some nonstandard techniques in combinatorics (slides), AIM SQuaRE preparatory meeting (June 7th, 2012);
  • Classification of automorphisms of C*-algebras (abstract, slides), Canadian Operator Symposium 2012 -- Queen's University (May 24th, 2012)
Other workshop and conferences