Slides from recent/selected talks:
 Survey talk on Discrete Morse Theory (Oct. 30, 2014, IMA, Minneapolis MN, Program on Discrete Structure: Analysis and Applications) Discrete Morse theory from a matching theoretic perspective, 6 megabytes (tablet pc handwritten slides).
 Richard Stanley 70th Birthday Conference (June 26, 2014, MIT, Cambridge MA):
Posets with each interval Homotopy Equivalent to a Ball or Sphere, 4 megabytes (tablet pc handwritten slides).
 IMA talk (April 29, 2014):
Topology and combinatorics of generically injective maps, 10 megabytes (tablet pc handwritten slides).
 Berkeley combinatorics seminar talk (March 10, 2014): Regular cell complexes in total positivity, 15 megabytes (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 talk (December 12, 2013): Regular cell complexes in total positivity, 15 megabytes (tablet pc handwritten slides). With extra slides at the end as an appendix giving indications of some more technical details.
 Michigan combinatorics seminar talk (November 1, 2013): Regular cell complexes in total positivity, 14 megabytes (tablet pc handwritten slides). This talk touches upon many more technical details and connections to results from topology than other talks I have given on this topic. It also includes extra slides as an appendix after the talk on topics I omitted from this particular talk.
 FPSAC invited address (June 27, 2013, Paris, France): Topological combinatorics of Bruhat order and total positivity, 9 megabytes (tablet pc handwritten slides)
 ICERM talk (March 5, 2013, Providence, RI): Longer version of "Symmetric chain decomposition for cyclic quotients of Boolean algebras and relation to cyclic crystals", 7 megabytes (tablet pc handwritten slides)  based on joint work with Anne Schilling.

AMS southeastern sectional meeting one hour invited address (March 1, 2013, Oxford, MS): An interplay of combinatorics with topology, 8 megabytes (tablet pc handwritten slides)

AMS special session talk (October 13, 2012, New Orleans, LA): Toric cubes, 3.9 megabytes (tablet pc handwritten slides)  based on joint work with Alex Engström and Bernd Sturmfels.
 NCSU seminar talk (August 26, 2011): Symmetric chain decomposition for cyclic quotients of Boolean algebras and relation to cyclic crystals, 6.1 megabytes (tablet pc handwritten slides)  talk also given at
UNC Chapel Hill (Sept. 16, 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.
 Seminar talk at NCSU, UNC Chapel Hill and Minnesota: The q=1 phenomenon via homology concentration, 3 megabytes (scanned handwritten slides)

U. Minnesota talk for combinatorics grad students (May 16, 2011): Discrete Morse theory (for posets), 7.1 megabytes (tablet pc handwritten slides)  talk also given at Banff Algebraic Combinatorixx meeting (May 26, 2011).

MIT women in math lecture series talk (April 4, 2011): Interplay of combinatorics and topology through posets (aimed at advanced MIT undergraduates and early graduate students), 8.8 megabytes (tablet PC handwritten slides)  shorter version given at joint meetings Michler/mentoring AWM minisymposium (January 8, 2011).

Cornell math department colloquium (Nov. 4, 2010): Regular CW complexes,
total positivity and Bruhat order (with an appendix giving a few extra pictures and a bit more detail regarding collapsing maps), 9.3 megabytes (tablet PC handwritten slides)  versions of this talk also given as a colloquium at USC (March 9, 2011), SUNY Albany (Oct. 29, 2010), UBC (March 19, 2010), Virginia Tech (April 17, 2009), UNC Charlotte (Jan. 21, 2011) and George Mason University (Nov. 16, 2012).
 SIAM discrete math meeting (June 1417, 2010, Austin, TX): CW Posets after the Poincare Conjecture (mainly a survey talk  as minisymposium organizer, I was asked to lead off the session with such a talk)

AMS sectional meeting (April 1011, 2010, St. Paul, MN): Sorting orders, subword complexes and a map to Bruhat order  based on joint work with Drew Armstrong.
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