Invited talks

Conference talks and colloquia

The complexity of the classification problem in ergodic theory, Logic In Southern California, March 2018, University of California at Irvine;

The noncommutative Poulsen simplex, Gupta Memorial Lecture, University of Regina, March 2018;

The complexity of the classification problem in ergodic theory, 26th Meeting of the Italian Logic Association, September 2017, Padova;

A notion of dimension for inclusion of C*-algebras, and applications, Workshop on Applications of Model Theory to Operator Algebras, University of Houston, August 2017;

A notion of dimension for inclusion of C*-algebras, and applications, 2017 Noncommutative Geometry and Operator Algebras, May 2017;

A notion of dimension for inclusion of C*-algebras, Workshop on C*-algebras and Dynamical Systems, CRM, Barcelona, March 2017;

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;

Borel complexity and C*-dynamics, UCLA Logic Colloquium, November 2016;

The noncommutative Poulsen simplex, 27th International Workshop on Operator Theory and Applications, Special Section on Noncommutative Inequalities, July 2016;

The Lusky simplex (slides), Spring 2016 AMS Sectional Meeting, Special Session on Descriptive set theory and its applications, April 2016;

The noncommutative Poulsen simplex, Classification and set theory, Intitut Mittag-Leffler, March 2016;

Weak equivalence of actions and first order logic, Logic in Southern California, Caltech, February 2016;

Polish groupoids and the classification of operator algebraic varieties (slides), 2015 Winter CMS Meeting, Special Session on Descriptive set theory, December 2015;

The noncommutative Poulsen simplex (slides), 2015 Winter CMS Meeting, Special Session on Operator Algebras, 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;

The Poulsen simplex and Fraïssé theory for metric structures, Workshop on Homogeneous Structures, November 2015, BIRS, Banff, Alberta, Canada;

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;

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 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;

The classification problem for separable operator systems (abstract, slides), 12th East Coast Operator Algebras Symposium -- Fields Institute, October 2014;

Ehrenfeucht–Fraïssé games in the logic for metric structures, Workshop on Model Theory and C*-algebras -- University of Münster, July 2014;

Conjugacy and cocycle conjugacy of automorphisms of O_2 are not Borel (abstract, slides), Workshop on C*-algebras and Dynamical Systems -- Fields Institute, June 2014;

An invitation to sofic groups, Math Department Colloquium -- Boise State University, Boise, United States (April 22nd, 2014);

Borel complexity and automorphisms of C*-algebras (abstract, slides), Workshop on Set Theory -- Mathematical Research Institute of Oberwolfach, January 2014;

Gottschalk's surjunctivity conjecture (abstract), Arbeitsgemeinschaft: Sofic Entropy, Mathematical Research Institute of Oberwolfach, October 2013;

Unitary equivalence of automorphisms of C*-algebras (abstract, slides), 2013 North American Annual ASL Meeting -- University of Waterloo, May 2013;

Model theoretic reformulations of the Connes embedding problem (abstract), Workshop on sofic and hyperlinear groups and the Connes embedding conjecture, UFSC, Florianopolis, June 2013;

The complexity of the relation of unitary equivalence of automorphisms of separable C*-algebras (abstract), Workshop on C*-Algebras, Dynamics, and Classification -- Mathematical Research Institute of Oberwolfach, October 2012;

Continuous logic and sofic groups (abstract, slides), Workshop on Continuous Logic and Functional Analysis -- Institut Camille Jordan, Lyon, July 2012;

Nonclassifiability of automorphisms of C*-algebras up to unitary equivalence (abstract, slides), Worskhop on Descriptive Set Theory and Functional Analysis -- BIRS, June 2012;

Descriptive set theory and classification problems in C*-algebra theory (abstract, slides), NSF/CBMS Regional Conference in the Mathematical Sciences -- University of Louisiana at Lafayette, May 2012.

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

26th meeting of the Italian Logic Association, University of Padova, September 25-28, 2017;

Workshop on Applications of Model Theory to Operator Algebras, University of Houston, July 31 - August 4, 2017;

2017 Noncommutative Geometry and Operator Algebras, Vanderbilt University, May 5-11, 2017;

Workshop on C*-algebras and Dynamical Systems, CRM, Barcelona, March 22, 2017;

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

LMS Research school "Combinatorics and operators in quantum information theory", September 5-9, 2016

27th International Workshop on Operator Theory and Applications, July 18-22, 2016

Workshop on Dynamical Systems and Operator Algebras, May 29 - June 1, 2016;

Spring 2016 AMS Sectional Meeting, April 2016;

2015 Winter CMS Meeting, December 5-7, 2015, Montreal, Canada;

Homogeneous Structures, November 8-13, 2015, BIRS, Banff, Alberta, Canada;

2015 West Coast Operator Algebras Seminar, October 10-11, 2015, University of California at San Diego, California, US;

2015 Annual ASL Meeting, March 25-28, 2015, University of Illinois at Urbana-Champaign, Illinois, US;

2015 Joint Mathematics Meetings, January 10-13, 2015, San Antonio, Texas, US;

2014 Canadian Mathematical Society Winter Meeting, December 5-8, 2014, McMaster University, Hamilton, Ontario, Canada;

2014 East Coast Operator Symposium, October 11-12, 2014, Fields Institute, Toronto, Canada;

Borel complexity and classification of operator systems, August 10-17, 2014, Focussed Research Group meeting, BIRS, Banff, Canada;

Nonstandard methods in number theory, AIM SQuaRE meeting, Palo Alto, California, US;

Model Theory and Operator Algebras, July 7-11, 2014, University of Münster, Münster, Germany;

Set Theory, January 13-17, 2014, Mathematical Research Institute of Oberwolfach, Obwerwolfach (Germany);

Sofic and hyperlinear groups and the Connes embedding conjecture, June 10-21, 2013, UFSC, Florianopolis, Brazil;

Nonstandard methods in number theory, June 3-7 2013, August 4-8 2014, and June 22-26 2015, AIM SQuaRE meeting, Palo Alto;

2013 North American ASL Meeting, May 8-11, 2013, University of Waterloo, Waterloo, Canada;

C*-Algebras, Dynamics, and Classification, October 28 - Novermber 3, 2012, MFO, Oberwolfach, Germany;

Descriptive Set Theory and Functional Analysis, June 18-22, 2012, BIRS, Banff, Alberta, Canada;

NSF/CBMS Regional Conference in the Mathematical Sciences, May 11-15, 2012, University of Louisiana at Lafayette, Louisiana, US;

15th Appalachian Set Theory Workshop, March 3rd, 2012, Carnagie Mellon University, Pittsburg, Pennsylvania, US;

Set Theory and C*-algebras, January 23-27, 2012, American Institute of Mathematics, Palo Alto, California, US.

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;

Noncommutative simplices, Wabash Modern Analysis Seminar, Wabash College, February 25, 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 geometry, Geometry 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 groupoids, Set Theory Seminar, Fields Institute (August 1st, 2014);

The Lopez-Escobar theorem for metric structures, and the topological Vaught conjecture, Toronto Set Theory Seminar, Fields Institute (May 23rd, 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);

The descriptive set theory of Polish groupoids, Set Theory Seminar, Fields Institute (December 13th, 2013);

The algebraic eigenvalues conjecture for sofic groups, Operator Algebras Seminar -- Fields Institute (October 29th, 2013);

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);

Borel complexity of equivalence relations from operator algebras (abstract), Set Theory Seminar -- Fields Institute (May 3rd, 2013);

C*-algebras and omytting types (abstract), Seminar in operator theory and operator algebras -- University of Virginia, Charlottesville (March 5th, 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 (abstract, slides) -- 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);

On the number of universal sofic and hyperlinear groups (abstract, slides), LaWiNe Seminar -- University of Vienna (April 18th, 2012);

Ultraproducts in logic and group theory (abstract, slides), LaWiNe Seminar -- University of Vienna (April 18th, 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).