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
Office: 618 Snow
Office hours for Fall 2019: Wed 3-4pm, Fri 1pm-2pm, 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 Jayhawk Math Teachers' Circle.
I oppose the legalization of concealed-carry weapons on university campuses. This is my personal opinion and not the official position of KU or the Department of Mathematics, although it is shared by former Chancellor Gray-Little, many Distinguished Professors at KU, the American Association of University Professors, and a large majority of students, staff and faculty at public universities in Kansas.
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.