Professor and Director of Graduate Admissions
Department of Mathematics
University of Kansas
405 Snow Hall
1460 Jayhawk Boulevard
Lawrence, KS 66045-7594
Office: 618 Snow
Office hours for Spring 2017: Wednesdays 3-5pm, or by appointment
Phone: (785) 864-7114
Department fax: (785) 864-5255
The best way to contact me: send e-mail to
Teaching | Research | Graduate Admissions | Mathematics Links | Fun Stuff
The 13th Graduate Student Combinatorics Conference will take place at the University of Kansas on April 8-9, 2017.
I am the Vice-Chair of the Kansas Section of the Mathematical Association of America. The University of Kansas will be hosting the 2017 annual meeting, which will take place April 28-29, 2017.
I support the Kansas Coalition for a Gun Free Campus, which opposes 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 Chancellor Gray-Little, many Distinguished Professors at KU, the American Association of University Professors, and a large majority of students, staff on 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: configuration varieties (such as picture spaces of graphs, and Grassmannian, flag, and Schubert varieties), simplicial complexes, 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.