
Southern California Algebra and Optimization Day at Caltech, Pasadena, March 6, 2008.8th UCB/UCSB Noncommutative Algebra Day, UCSB, Santa Barbara, April 5, 2008.Talk presented: The pp conjecture in the theory of spaces of orderings. 5th Linear Algebra Workshop, Kranjska Gora, Slovenia, May 27 - June 1, 2008.7th Polish, Slovak and Czech Conference on Number Theory, Ostravice, Czech Republic, June 10 - 12, 2008.Essential Dimension and Canonical Dimension in Lens, France, June 23 - 27, 2008.Southern California Algebra Conference, UCLA, Los Angeles, November 22, 2008.Southern California Algebra Conference, UCLA, Los Angeles, April 4, 2009.

Talk presented: Certain quotient spaces of spaces of orderings and their inverse limits. Positivity, Valuations, and Quadratic Forms Conference in Konstanz, Germany, October 1 - 6, 2009.Gdańsk-Kraków-Warsaw Seminar on Singularity Theory at University of Silesia in Katowice, Poland, April 9 - 10, 2010.Patching, Involutions and Buildings in Lens, France, June 14 - 18, 2010.Talk presented: Realizability of profinite spaces of orderings. Joint Conferences on Algebra, Logic and Number Theory: 9th Colloquiumfest on Algebra and Logic and 8th Czech, Polish and Slovak Conference on Number Theory in Bukowina Tatrzańska, June 21-24, 2010.Steklov Institute of Mathematics of the Russian Academy of Sciences in St. Algebraic Geometry, K-theory, and Motives at Euler International Mathematical Institute at the St.Convex Optimization and Algebraic Geometry workshop within Modern Trends in Optimization and Its Application program at the Institute for Pure and Applied Mathematics at UCLA, Los Angeles, September 28 - October 1, 2010.K-Theory and Motives, UCLA, Los Angeles, March 22-25, 2011.Real Algebraic Geometry conference at the Universite de Rennes 1, Rennes, France, June 20-24, 2011.Arithmetique, Algebre et Applications conference at the Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland, June 27-29, 2011.Talk presented: Quotients of spaces of orderings of arbitrary index. Workshop Emerging Developments in Real Algebraic Geometry: Positivity, Convexity, NC-Geometry, Optimization at the Otto-von-Guericke-Universitat Magdeburg, Magdeburg, Germany, February 20-24, 2012.Scientific Session in honour of Friedrich Hirzebruch on the occasion of his 85th birthday at the Stefan Banach International Mathematical Center in Warsaw, Poland, May 18, 2012.


International Conference on the Algebraic and Arithmetic Theory of Quadratic Forms in Puerto Natales, Chile, December 16 - 21, 2013.Joint Conferences on Algebra, Logic and Number Theory: 15th Colloquiumfest on Algebra and Logic and 10th Czech, Polish and Slovak Conference on Number Theory in Będlewo, Poland, June 8 - 13, 2014.Linear algebraic groups, vector bundle classification and division rings in Lens, France, June 15 - 19, 2015.Cohomological Methods in the Theory of Algebraic Groups at the Centre International Recontres Mathematiques in Luminy, France, August 31 - September 5, 2015.Talk presented: Witt equivalence of function fields over global fields Ordered Algebraic Structures and Related Topics at the Centre International Recontres Mathematiques in Luminy, France, October 12 - 16, 2015.
