Recreations
- 122
- Polyforms
- Ed Pegg Jr.'s site has pages on tiling, packing, and related problems involving polyominos, polyiamonds, polyspheres, and related shapes.
- 123
- Polyomino Enumeration
- K. S. Brown examines the number of polyominoes up to order 12 for various cases involving rotation or reflections. Equations linking the cases are proposed.
- 125
- Somatic
- A solver for arbitrary polyomino and polycube puzzles. Binary code and source downloads available.
- 126
- Sqfig and Sqtile
- Eric Laroche presents computer programs for generating polyominoes and polyomino tilings. Includes source codes in C, and binaries.
- 128
- 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.
- 129
- The Pentomino Dictionary by Gilles Esposito-Farèse
- English words that can be written using the pentomino name letters FILNPTUVWXYZ and other related curiosities, including a homage to Georges Perec. (English/French).
- 132
- Unbalanced Anisohedral Tiling
- Joseph Myers and John Berglund found a polyhex that must be placed in two different ways in a tiling of a plane, such that one placement occurs twice as often as the other.
- 133
- Unbeatable Tetris
- Java applet demonstres that this tetromino-packing game is a forced win for the side dealing the tetrominoes. Complete with mathematical proof. [Java]
- 135
- Arabic numerals
- Describes the history of the Arabic numeral system that is in use nearly all over the world today.
- 136
- Ask Dr. Math: History of the Terms Google and Googleplex
- Explains how these very large numbers (1 followed by a hundred zeroes, and 1 followed by a google of zeroes, respectively) were named. With links to references. From Swarthmore's Dr. Math.