Interests  Geometrical Packing 

Combinatorial Geometry  
Game Theory  
Graph Theory  
Education  Ph.D. in Mathematics, Cornell University, 1991 
M.S. in Mathematics, Cornell University, 1989  
B.S. in Mathematics, RoseHulman Institute of Technology, 1987  
Employment  Associate Professor, Stetson University, 19982018 (Chair, 20002003) 
Assistant Professor, Stetson University , 19921998  
Acting Assistant Professor, Cornell University, 19911992  
Instructor, Cornell University, 19901991  
Refereed Papers

Saturated Sets of Distinct Integer Equilateral Triangles, (with J. Tilley),
Geombinatorics, Volume XXXII 2 (2023) 117121. 
NonTiles and Walls  A Variant on the Heesch Problem, (with R. Nandakumar),
Geombinatorics, Volume XXVI 1 (2016) 511.  
The Immune System Game, (with Kirsten A. Work and Melissa A. Gibbs),
The American Biology Teacher, Volume 77 5 (2015) 382390.  
Covering Squares with Unit Squares, (with David A. Paterson),
Geombinatorics, Volume XV 3 (2006) 130137.  
Hinged Dissection of Polyominoes and Polyforms,
(with Erik Demaine, Martin Demaine, David Eppstein and Greg Frederickson), Computational Geometry Theory & Applications, Volume 31, 3 (2005) 237262.  
30 TwoColored Points with No Empty Monochromatic Convex Fourgons,
Geombinatorics, Volume XIV, 2 (2004) 5354.  
Partridge Numbers, (with Patrick Hamlyn),
Geombinatorics, Volume XIII 1 (2003) 1018.  
Pascal's Triangle and the Boltzmann Distribution (with Tandy Grubbs),
The Chemical Educator, 8 (2003) 116121.  
Squares Touching a Constant Number of Other Squares,
Geombinatorics, Volume XII, 2 (2002) 5560.  
Constant Neighbor Dihedral Tilings with 15, 32, and 43 Neighbors
(with Berend Jan van der Zwaag), Geombinatorics, Volume XI, 3 (2002) 7477.  
Magic Carpets (with Mike Keith),
Journal of Integer Sequences, Volume 3, Issue 2 (2000)  
NVex Shapes, Geombinatorics, Volume IX, 4 (2000) 159163.  
Heesch Tiles with Surround Numbers 3 and 4,
Geombinatorics, Volume VIII, 4 (1999) 101103.  
Packing Unit Squares in Squares: A Survey and New Results,
Electronic Journal of Combinatorics, DS7, 1998, 2000, 2002, 2005, 2009  
How Many Bridge Auctions? (with Douglas Jungreis),
College Mathematics Journal, 19 (1988) 171172.  
Other Papers  Cubic is NPcomplete, Proceedings of Florida MAA Section Meeting, 2001 
What's in a Name?, Math Horizons, p. 35, April 2001  
Hinged Dissection of Polyominoes and Polyforms
(with Erik Demaine, Martin Demaine, and David Eppstein), Proceedings of 11^{th} Canadian Conference on Computational Geometry, 1999  
Plenary Talks

Two Dozen Unsolved Problems in Planar Geometry,
EmbryRiddle Undergraduate Mathematics Conference, 2004 
Reptiles, Partridges, and Golden Bees: Tiling Shapes with Similar Copies,
MAA meeting, 2003  
Other Talks  Tiling Triangular Polyominoes With Two Tiles, Department Seminar, 2006 
Minimal Matchstick Graphs With Small Degree Sets, Department Seminar, 2006  
A Dozen Unsolved Problems in Geometry, Department Seminar, 2003  
Spiral Galaxies Puzzles are NPComplete, Department Seminar, 2002  
Triangle Centers, MAA meeting, 2002  
Hackenbush: The Simple Truth, QED Seminar, 2001  
Cubic is NPComplete, MAA meeting, 2001  
Cubic is NPComplete, Department Seminar, 2000  
New Bounds on Large Regular Planar Graphs, MAA meeting, 2000  
How to Cut a Cake, Department Seminar, 1999  
New Bounds on Large Planar Graphs, Department Seminar, 1999  
Packing Squares, MAA meeting, 1998  
Packing Unit Squares in Squares, Department Seminar, 1997  
The Game of Life, Department Seminar, 1996  
Trapezoidal Numbers, Department Seminar, 1996  
Mathematics and Can Stacking, DeLand High School, 1994, 1996  
The Marksman Problem, Department Seminar, 1995  
Mathematica and Interactive Statistics, MAA/AMS meetings, 1995  
Geometric Dissections, Department Seminar, 1994  
StetStat: An Interactive Statistics Package, ICTCM, 1994  
The Four Color Theorem, Department Seminar, 1994  
Courses Taught  Finite Math, Precalculus, Business Calculus, Calculus I, II & III 
Calculus with Review Part I & II, Real Analysis I & II, Complex Analysis,  
Probability, Intro to Math & Stat Modeling, Mathematical Statistics, Mathematical Modeling,  
Intro to Game Theory, Game Theory Seminar, Graph Theory, Senior Research I & II  
MiniCourses  Multivariable Calculus Using the Harvard Calculus Consortium Materials, 1995 
Teaching Calculus Using Mathematica, 1993  
Calculus and Mathematica on the Macintosh, 1993  
Service  Department Chair, 20002003 
Acting Department Chair, Summer 19982000, 2005, 2006  
General Education Committee, 20142018  
Admissions Committee, 19941997, 20002003, 20112012 (Chair 19961997, 20012003)  
Faculty Senate, 19951998  
Stetson High School Math Contest Organizer, 19951999  
Math/Computer Science Seminar Organizer, 19941999  
Mathematical Contest in Modeling Organizer, 1997, 1998  
Putnam Examination Organizer, 1992, 1997, 1999, 2003, 2004, 2006, 2008, 2009  
Faculty Advisor to QED, 19992000, 20042005, 20062009  
Faculty Advisor to Chess Club, 20122014  
Faculty Advisor to Club Bridge, 20012012  
Other Activities  Reviewed note, American Mathematical Monthly, 2006 
Reviewed article, Electronic Journal of Combinatorics, 2005  
Consultant, Volusia County Environmental Health Lab, 2003  
Associate Editor, Encyclopedia of Integer Sequences, 2002  
Editor, RoseHulman Insititute of Technology Undergraduate Mathematics Journal, 19992009  
Reviewed textbook, Addison Wesley Longman Publishers, 1999  
Field tested Mathematica software as part of NSF grant, 1999  
Reviewed article, Electronic Journal of Combinatorics, 1998  
Statistical Consultant, Volusia County Health Services, 19941995  
Mathematical Consultant, Enigmatix Inc., 1994  
Reviewed textbook, John Wiley Publishers, 1994  
Reviewed article, PRIMUS, 1993  
Erdös Number  3 