Professor of Mathematics, University of Kansas
Section Chief Editor, Frontiers for Young Minds, Understanding Mathematics
Department of Mathematics
University of Kansas
405 Snow Hall
1460 Jayhawk Boulevard
Lawrence, KS 66045-7594
I will rarely be on campus for the rest of the semester.
Office: 618 Snow
Office hours for Spring 2019: Thu, 1:00-2:30pm, or by appointment
Phone: (785) 864-7114
Department fax: (785) 864-5255
The best way to contact me: send e-mail to
Teaching | Research | Mathematics Links | Fun Stuff
I am the Section Editor of the Understanding Mathematics section of Frontiers for Young Minds, an open-access journal with articles written by scientists and reviewed by kids. We are looking for help at all levels: editors, authors, science mentors, and of course kids to review and read articles!
I am a co-organizer of the fourth Great Plains Combinatorics Conference, to be held at North Dakota State University, April 25-26, 2020.
UPDATE: GPCC 2020 has been postponed indefinitely due to the coronavirus outbreak. We hope to hold the conference at a later date.
I am a co-organizer of the Graduate Research Workshop in Combinatorics. The 2020 workshop will be held at the Institute for Mathematics and its Application in Minneapolis from May 20-June 1.
UPDATE: GRWC 2020 has been cancelled due to the coronavirus outbreak.
I am a co-organizer of the Jayhawk Math Teachers' Circle.
UPDATE: JMTC is on hold indefinitely due to the coronavirus outbreak. We hope to hold the conference at a later date.
My main focus of research is algebraic combinatorics. I also am interested in areas of mathematics including algebraic geometry, discrete geometry, commutative algebra, and algebraic topology. I especially like topics in which these fields intersect: simplicial and cell complexes, configuration varieties, Coxeter groups, hyperplane arrangements, Stanley-Reisner theory, matroids, Gröbner bases, and combinatorial Hopf algebras and monoids. I am always happy when combinatorial techniques can be used to solve problems from other areas of pure or applied mathematics.