Slides for some talks

Total positivity in combinatorics and representation theory, Brisbane, 2010

The shape of a random affine Weyl group element, Boston 2011

Laurent phenomenon algebras, Nagoya 2012

Electrical networks and Lie theory, Boulder 2013

Infinite reduced words, Guanajuato 2013

Electroids and positroids, Minneapolis 2014

Truncated Stanley symmetric functions and amplituhedron cells, Boston, 2014

Totaly positivity, crystals, and Whittaker functions, CDM Lecture 1, 2014

Totally nonnegative Grassmannian and the amplituhedron, CDM Lecture 2, 2014

Combinatorics of electrical networks, Brunswick 2016

Mirror symmetry for flag varieties via Langlands reciprocity

On the topology of totally positive spaces, Ann Arbor 2018

Total positivity and networks, Curia 2019

Total positivity and statistical mechanics, Curia 2019

Total positivity and combinatorial topology, Curia 2019

Dimers and Webs, Zoom 2020

Positroids and q,tCatalan numbers, Zoom 2020
Lecture notes and exercises
Exercises for tutorial on total positivity and the amplituhedron at Combinatorial Coworkspace (with Amanda Schwartz).
Lecture notes for Combinatorial Algebraic Geoemtry from Physics workshop at MPI Leipzig.
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