Slides from recent/selected talks

Southeast Lie Theory Meeting (October 911, 2015, Raleigh NC): From the weak Bruhat order to crystal posets (tablet pc handwritten slides).

Brown University math department colloquium (February 23, 2015, Providence RI): Combinatorics and topology of totally positive spaces (tablet pc handwritten slides).
 Combinatorial algebra meets algebraic combinatorics conference one hour plenary talk (January 2325, 2015, Kingston, Ontario, Canada): Regular cell complexes in total positivity (tablet pc handwritten slides).
 Wachsfest Conference one hour talk (January 6, 2015, Miami FL): Representation stability in the partition lattice (tablet pc handwritten slides). Includes some additional material not in the earlier talks below on this topic  based on joint work with Vic Reiner.
 Stanford University topology seminar (December 2, 2014): Regular cell complexes in total positivity (tablet pc handwritten slides).
 Stanford University representation stability seminar (December 2, 2014): Representation stability and S_nmodule structure in the partition lattice (tablet pc handwritten slides)  based on joint work with Vic Reiner.
 U. Chicago geometry/topology seminar (November 18, 2014): Regular cell complexes in total positivity (tablet pc handwritten slides).
 U. Wisconsin combinatorics seminar (November 3, 2014): Representation stability and S_nmodule structure in the partition lattice (tablet pc handwritten slides)  based on joint work with Vic Reiner.
 Survey talk on Discrete Morse Theory (Oct. 30, 2014, IMA, U. Minnesota, Minneapolis MN, Program on Discrete Structure: Analysis and Applications) Discrete Morse theory from a matching theoretic perspective (tablet pc handwritten slides)  partly based on joint work with Eric Babson.
 A Conference Honoring Richard Stanley (June 26, 2014, MIT, Cambridge MA):
Posets with each interval homotopy equivalent to a ball or sphere (tablet pc handwritten slides)  based on joint work with Karola Mészáros.
 IMA conference one hour talk (April 29, 2014):
Topology and combinatorics of generically injective maps, (tablet pc handwritten slides)  partly based on joint work with Alex Engström and Bernd Sturmfels.
 Berkeley combinatorics seminar (March 10, 2014): Regular cell complexes in total positivity, (tablet pc handwritten slides). With extra slides at the end as an appendix giving indications of some more technical details. Very similar (but not identical) to UCLA talk.
 UCLA combinatorics seminar (December 12, 2013): Regular cell complexes in total positivity, (tablet pc handwritten slides). With extra slides at the end as an appendix giving indications of some more technical details.
 Michigan combinatorics seminar (November 1, 2013): Regular cell complexes in total positivity, (tablet pc handwritten slides). This includes extra slides as an appendix after the talk on topics I omitted from this particular talk.
 FPSAC Conference one hour plenary address (June 27, 2013, Paris, France): Topological combinatorics of Bruhat order and total positivity, 9 megabytes (tablet pc handwritten slides)
 ICERM 45 minute talk (March 5, 2013, Providence, RI): Symmetric chain decomposition for cyclic quotients of Boolean algebras and relation to cyclic crystals, 7 megabytes (tablet pc handwritten slides)  talk also given at
UNC Chapel Hill (Sept. 16, 2011), NCSU seminar (August 26, 2011, U. Penn/Drexel (Oct. 18, 2011), Georgia Tech (Nov. 18, 2011), Michigan (March 30, 2012), and a shorter version at AMS sectional meeting at George Washington University (March 17, 2012)  based on joint work with Anne Schilling.
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