Combinatorics Group
Department of Mathematics
University of Kansas

Ongoing/Upcoming Events

• Every Friday, 4pm CT: KU Combinatorics Seminar
• Every Wednesday, 12pm CT: Graduate Online Combinatorics Colloquium (GOCC)
• Doug West's list of combinatorics conferences
• AMS Sectional Meeting at KU, March 29-30, 2025, including:
  • Invited address by Pamela Harris
  • Special Session on Algebraic, Geometric, and Topological Combinatorics (organized by Marge Bayer, Pamela Harris, and Jeremy Martin)
  • Special Session on Combinatorics and Lie Theory (organized by Reuven Hodges, Nathan Lesnevich, and Ed Richmond)
• Graduate Research Workshop in Combinatorics, June 15-27, 2025 (University of Vermont)

Past Events

• Great Plains Combinatorics Conference: April 29-May 1, 2022, North Dakota State University
• Graduate Research Workshop in Combinatorics, June 17-28, 2019 (KU)
• Great Plains Combinatorics Conference 2018, April 28-29, 2018, Kansas State University
• Graduate Student Combinatorics Conference, April 7-9, 2017 (KU)
• Great Plains Combinatorics Conference May 21-22, 2016 (KU)
• Great Plains Combinatorics Conference, April 26-27, 2014 (KU)

Faculty

• Margaret Bayer, Professor
• Reuven Hodges, Assistant Professor
• Jeremy Martin, Professor

Graduate Students

• Mark Denker (advisor Martin)
• May Bee Trist (advisor Martin)
• Chris Uchizono
• Han Yin (advisor Hodges)

Alumni

• Dania Morales (PhD, 2024; advisor Martin)
  • Dissertation title: Matroid Base Polytopes of Lattice Path Matroids and Ehrhart Theory
• Enrique Salcido (M.A., 2023; advisor Martin)
  • Project title: Counting subtrees using the chromatic symmetric function
• Melody Yu (M.A., 2023; advisor Bayer)
  • Project title: Eigenstructures in Data Analysis: Investigating the Foundations of Spectral Clustering
• Kevin Marshall (Ph.D., 2022; advisor Martin)
  • Dissertation title: A Hopf Monoid On Set Families
• Federico Castillo (Visiting Assistant Professor, 2018-2020)
• Emma Colaric (M.A., 2020; advisor Martin)
  • Project title: Scheduling Problems and Ehrhart Theory
• Joseph Doolittle (Ph.D., 2019; advisor Bayer)
  • Dissertation title: Combinatorics, Geometry, and Topology of Polytopal Complexes
• Ken Duna (Ph.D., 2019; advisor Martin)
  • Dissertation title: Matroid Independence Polytopes and Their Ehrhart Theory
  • Dissertation in KU ScholarWorks
• Bennet Goeckner (Ph.D., 2018; advisor Martin).
  • Dissertation title: Decompositions of Simplicial Complexes
  • Dissertation in KU ScholarWorks
• Marcus Gubanyi (M.A., 2016; advisor Bayer)
• Kevin Adams (M.A., 2015; advisor Bayer)
  • Project title: On Kernels, β-graphs, and β-graph Sequences of Digraphs
  • Dissertation in KU ScholarWorks
• Josh Fenton (M.A., 2015; advisor Bayer)
• William Espenschied (Ph.D., 2014; advisor Bayer).
  • Dissertation title: Graphs of polytopes
  • Dissertation in KU ScholarWorks
• Alex Lazar (M.A., 2014; advisor Martin)
• Jay Schweig (Robert D. Adams Visiting Associate Professor, 2008-2012)
• Isaac Lambert (M.A., 2012; advisor Jay Schweig)
• Chris Trotter (M.A., 2012; advisor Bayer)
• Tom Enkosky (Ph.D., 2011; advisor Martin).
  • Dissertation title: Enumerative and algebraic aspects of slope varieties
  • Dissertation in KU ScholarWorks
• Brandon Humpert (Ph.D., 2011; advisor Martin).
  • Dissertation title: Polynomials associated with graph colorings and orientations
  • Dissertation in KU ScholarWorks
• Alex Schaefer (M.A., 2011; advisor Jay Schweig)
• Jonathan Hemphill (M.A., 2011; advisor Martin)
• Jonathan Delgado (M.A., 2010; advisor Bayer)
• Jenny Buontempo (M.A., 2008; advisor Martin)
• Brett Cooper (M.A., 2003; advisor Bayer)
• David Sayler (M.A., 2001; advisor Bayer)
• Aaron Bruening (M.A., 2000; advisor Bayer)
• Joshua Stewart (M.A., 2000; advisor Bayer)
• Geraldine Dotson (M.A., 1997; advisor Bayer)
• Sonja Benson (M.A., 1991; advisor Bayer)
• Nancy Campbell (M.A., 1991; advisor Bayer)
• Mary Combrink (M.A., 1989; advisor Bayer)

Combinatorics Seminar

Seminar schedule for the current semester (Fall 2024)

Seminar schedules from previous semesters:
Fall 2024 | Spring 2024
Fall 2023 | Spring 2023 | Fall 2022 | Spring 2022 | Fall 2021 | Spring 2021 | Fall 2020 | Spring 2020 | Fall 2019 | Spring 2019 | Fall 2018 | Spring 2018
Fall 2017 | Spring 2017 | Fall 2016 | Spring 2016 | Fall 2015 | Spring 2015 | Fall 2014 | Spring 2014 | Fall 2013 | Spring 2013 | Fall 2012 | Spring 2012
Fall 2011 | Spring 2011 | Fall 2010 | Spring 2010 | Fall 2009 | Spring 2009 | Fall 2008 | Spring 2008 | Fall 2007 | Spring 2007 | Fall 2006 | Spring 2006

Online References

• MathSciNet (requires subscription)
• The On-Line Encyclopedia of Integer Sequences
• FindStat (combinatorial statistic finder)
• MathOverflow
• arXiv.org e-Print Archive
• What is Combinatorics? (quotes collected by Igor Pak)

Free Software

• Sage / CoCalc (general purpose)
• Macaulay 2 (computational commutative algebra and algebraic geometry)
• Polymake (convex polyhedra, finite simplicial complexes)
• LattE (discrete geometry, counting lattice points)