My mathematical interests are in
combinatorics,
often of an algebraic or order-theoretic nature.
Some of my recent work has had to do with P-partitions, Möbius functions and edge-labellings of
partially ordered sets, Schur-positivity, quasisymmetric functions, and relationships among
skew Schur functions.
I have had the pleasure of collaborating with
Sami Assaf,
Jean-Christophe Aval,
François Bergeron,
Sara Billey,
Daniel Birmajer,
Emmanuel Briand,
Roberto Costas,
Karimatou Djenabou,
Mark Dukes,
Sergi Elizalde,
Juan Gil,
Charlie Johnson,
Stefan Leichenauer,
Nate Lesnevich,
Rosa Orellana,
Christophe Reutenauer,
Mercedes Rosas, Bruce Sagan,
Einar Steingrímsson,
Hugh Thomas,
Jordan Tirrell,
Ryan Ward,
Mike Weiner and
Stephanie van Willigenburg
Papers and publications with abstracts.
Presentations, many with accompanying slides.
Conference organization
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Joel Lewis, Sam Hopkins and I organized the Special Session on Algebraic and Enumerative Combinatorics at the Spring Eastern Section Meeting of the AMS at Howard University, Washington DC, April 6–7, 2024.
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I was on the program committee for the
32nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2020), which was planned to take place at Bar Ilan University in Ramat Gan, Israel, but took place online, July 6–24, 2020.
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I was on the organizing committee for the
30th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2018), which took place at Dartmouth College, Hanover NH, July 16–20, 2018.
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I was on the program committee for the
28th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2016), which took place in Vancouver on July 4–8, 2016.
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I was on the program committee for the
25th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2013), which took place in Paris on June 24–28, 2013.
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I was on the organizing committee for the 22nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2010), which took place at San Francisco State University, August 2–6, 2010. My contribution was the preparation of the proceedings.
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Mark Skandera and I organized the Special Session on Algebraic Combinatorics at the Fall Eastern Section Meeting of the AMS at Penn State University, October 24–25, 2009.
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François Bergeron, Riccardo Biagiloli, Christophe Reutenauer and I organized the Special Session
in Algebraic Combinatorics at the CMS Winter Meeting 2004 in Montreal.