Professor of Mathematics, University of Kansas
Chair, Kansas Section of the Mathematical Association of America
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 Spring 2019: Fridays, 2-4pm, 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 research interests include combinatorics, algebraic geometry, discrete geometry, and computational commutative algebra. I especially like topics in which these fields intersect: simplicial and cell complexes, configuration varieties (such as picture spaces of graphs), Coxeter groups, hyperplane arrangements, Stanley-Reisner theory, matroids, Gröbner bases, and combinatorial Hopf algebras. I am always happy when combinatorial techniques can be used to solve problems from other areas of pure or applied mathematics.