Invited talks


  • Noncommutative simplices, Colloquium at Queen's University Belfast, February 10, 2017;
  • Operator systems in quantum information theory and noncommutative Choquet theory, Colloquium at the University of Ottawa, January 20, 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 6th, 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 18th, 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 11, 2015);
  • The classification of multiplier algebras of operator algebraic varieties, Colloquium, Universidad Complutense de Madrid (June 26th, 2015);
  • Noncommutative analogs of the Gurarij Banach space (abstract, slides), 2015 Annual ASL Meeting, Special Session on Set Theory, University of Illinois at Urbana-Champaign (March 27th, 2015);
  • The complexity of classification problems in operator algebras, Joint Mathematics Meeting 2015, Special Session on Classification Problems in Operator Algebras -- San Antonio (January 11th, 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 8th, 2014); 
  • Borel complexity and automorphisms of C*-algebras (abstract, slides), Workshop on Set Theory -- Mathematical Research Institute of Oberwolfach (January 15th, 2014);

Invited research visits

  • 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;
  • 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 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