Mathematicians

Gerard's Pentomino Page Gerard's Pentomino Page- Illustrates the 12 shapes. symmetrical combinations. Flexagons Flexagons- Conrad and Hartline's 1962 article on Flexagons. Harold McIntosh's Flexagon Papers Harold McIntosh's Flexagon Papers- Including copies of the original 1962 Conrad-Hartline papers. Abstract, html-pages, or .pdf documents. Packing Shapes Packing Shapes- Erich Friedman's Introduction to a variety of packing and tiling problems. Rectifiable Polyomino Rectifiable Polyomino- Karl Dahlke explains and demonstrates tiling. Includes C-program source. Pentominoes Pentominoes- Expository paper by R. Bhat and A. Fletcher. Covers pre-Golomb discoveries. the triplication problem and other aspects. Sqfig and Sqtile Sqfig and Sqtile- Eric Laroche presents computer programs for generating polyominoes and polyomino tilings. Includes source codes in C, and binaries. Pentominos Puzzle Solver Pentominos Puzzle Solver- David Eck's graphical solver applet uses recursive technique. Source code available. [Java] Canonical Polygons Canonical Polygons- Ronald Kyrmse investigates grid polygons in which all side lengths are one or sqrt(2). Blocking Polyominos Blocking Polyominos- Rodolfo Kurchan searches the smallest polyomino such that a particular number of copies can form a blocked pattern. With solutions. Puzzle Fun Puzzle Fun- Newsletter edited by Rodolfo Kurchan about pentominoes and other math problems. Counting Horizontally Convex Polyominoes Counting Horizontally Convex Polyominoes- Journal of Integer Sequences, Vol. 2 (1999), Article 99.1.8. Defines and counts horizontal convexity. Somatic Somatic- A solver for arbitrary polyomino and polycube puzzles. Binary code and source downloads available. Cynthia Lanius' Lesson: Polyominoes Introduction Cynthia Lanius' Lesson: Polyominoes Introduction- From tetris to hexominoes, Cynthia explains them in color. Pento-Mania Pento-Mania- Pentomino based puzzle game lets children solve and create geometric puzzles. Win32 software, try or buy. Logical Art and the Art of Logic Logical Art and the Art of Logic- Pentomino pictures, software and other resources by Guenter Albrecht-Buehler. Pentominos Pentominos- Graphics problems, solutions (including animated GIF) and links. (English/German through main page) Schröder Triangles, Paths, and Parallelogram Polyominoes Schröder Triangles, Paths, and Parallelogram Polyominoes- A paper on their enumeration by Elisa Pergola and Robert A. Sulanke. Thorleif's SOMA Page Thorleif's SOMA Page- SOMA puzzle site with graphics, newsletter and software. Christopher Monckton's Eternity Puzzle Christopher Monckton's Eternity Puzzle- Rules, the solution by Alex Selby and Oliver Riordan, other resources and links. The puzzle is made up of 209 pieces of polydrafters, each … Gerard's Universal Polyomino Solver Gerard's Universal Polyomino Solver- Computes from 1 to 3.38 billion solutions with graphic display to each of the 60+ problems of different sizes and shapes. Pieces vary from pen… The Geometry Junkyard: Polyominoes The Geometry Junkyard: Polyominoes- Numerous links, sorted alphabetically. Polyominoes Polyominoes- Describes a numerical invariant that can be used to classify polyominoes. The Mathematics of Polyominoes The Mathematics of Polyominoes- Kevin Gong offers download of his polyominoes games shareware for Windows and Mac. 100 boards are included. A Java version is under development. Gamepuzzles Gamepuzzles- Polyomino and polyform games and puzzles manufactured by Kadon Enterprises Inc. Operations Research by the Beach Operations Research by the Beach- Comments, ideas and analysis of real-life problems from the perspective of an operations researcher. TORSCHE Scheduling Toolbox for Matlab TORSCHE Scheduling Toolbox for Matlab- It performs various off-line and on-line scheduling. Global Optimization Global Optimization- Links to global optimization. Michael Trick’s Operations Research Blog Michael Trick’s Operations Research Blog- Thoughts, opinions, and pointers on the world of OR/MS. OR-Library OR-Library- A library of problem instances covering various OR/MS areas.