Recent Publications
 

• On the Holt-Klee Property for Oriented Matroid Programming

           To appear in European Journal of Combinatorics

• A Proof of the Strict Monotone 5-step Conjecture (With J. Mackenzie Gallagher)

           Discrete and Computational Geometry 65 (2021), 476-488

•   Acyclic Digraphs Giving Rise to Complete Intersections

           Journal of Commutative Algebra 11(2) (2019), 241-264.

•   A Mihalisin-Klee Theorem for Fans(With R. Locke)

           Discrete and Computational Geometry 56(1) (2016), 114-125

•   Efficient Computation of a Canonical Form for a Generalized P-matrix

           Mathematical Programming 153 (2015), 275-288

•   Chromatic Numbers of Copoint Graphs of Convex Geometries(with J. Beagley)

           Discrete Mathematics 331 (2014), 151-157.

•   On Minkowski Sums of Simplices, (with G. Agnarsson)

           Annals of Combinatorics 13 (2009), 271-287.

•   Finite Sets as Complements of Finite Unions of Convex Sets, (with J. Lawrence)

           Discrete and Computational Geometry 42 (2009), 206-218.

•   Good hidden P-matrix sandwiches, (with M. Namiki)

           Linear Algebra and its Applications 426 (2007), 325-341.

•   Unique Sink Orientations of Grids (Extended Abstract), (with B. Gaertner and L. Ruest)

           Lecture Notes in Computer Science 3509 (2005). Full version, Algorithmica 51 (2008), 200-235.

•   Coloring Copoints of a Planar Point Set,

           Discrete Applied Mathematics, 154 (2006), 1742-1752.

•   Recognition of Hidden Positive Row Diagonally Dominant Matrices,

           Electronic Jounal of Linear Algebra 10 (2003), 102-105.

•  Distinguishing Cube Orientations Arising from Linear Programs,

           Manuscript (2002).

•  Randomized principal pivot algorithms for P-matrix linear complementarity problems ,

           Mathematical Programming, Ser. A 92 (2002), 285-296.