Transformações geometricas, Talk given at the Ari de Sa high school in Fortaleza, Brazil, May 2015.

Determinantes, Talk given at the Ari de Sa high school in Fortaleza, Brazil, May 2015.

Theta Functions and Knots, Colloquium talk advertising my book, given at University of Michigan, Ann Arbor, November 2014.

Obtaining the Witten-Reshetikhin-Turaev invariants from quantum mechanical considerations, 50 Years of Topology, Geometry and Physics at CINVESTAV, November 2011.

Representations of the Kauffman bracket skein algebra of the punctured torus, XXXII Knots in Washington, April 2011.

La teorìa Chern-Simons desde el punto de vista de la mecànica cuàntica Congreso Nacional de la Sociedad Matemàtica Mexicana, Tuxtla-Gutierrez, Mexico, November 2010.

From classical theta functions to topological quantum field theory, 8th Joint Meeting of the AMS and SMM, 2010.

Non-abelian theta functions a la Andrè Weil, XXX Knots
in Washington, 2010.

Look at the extrema!, Dallas Metroplex Math Circle, March 2010.

Regular polygons, Dallas Metroplex Math Circle, November 2010.

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