Slides from selected talks:

• 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).
  
  
• Minnesota talk for 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), and UNC Charlotte (Jan. 21, 2011).
  
  
• SIAM discrete math meeting, Austin TX (June 14-17, 2010): 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, St. Paul MN (April 10-11, 2010): Sorting orders, subword complexes and a map to Bruhat order