| WebMath A mailing list for those interested in mathematics on the World Wide Web. |
| Yahoo_Groups___Erdos A group for proposing problems, sharing ideas, discussing areas of research and reviewing papers and books of interest. [Requires Yahoo! membership] |
| Yahoo_Groups___maththeorists Discussions relating to number and mathematics philosophy. |
| Yahoo_Groups_in_Mathematics Mailing lists and discussion groups (including former OneList and eGroups). |
| Yahoo_Groups__Math_For_Fun Focuses on solving challenging math problems. |
| Yahoo_Groups__Theory-edge Informal discussion of research in algorithmics, mathematics, and their applications. |
| Artlandia_SymmetryWorks Adobe Illustrator plug-in that automates creation of surface designs and ornaments based on seventeen wallpaper groups. On-line purchase. |
| Catalogue_of_Isohedral_Tilings From the article "One Corona is Enough for the Euclidean Plane" by Doris Schattschneider and Nikolai Dolbilin. |
| Chaos_Tiles This chaotic tiling consists of two equilateral pentagons, with angles (80, 160, 60, 140, 100) and (40, 200, 60, 100, 140). Sets are for sale. |
| The_14_Different_Types_of_Convex_Pentagons_that_Tile_the_Plane Graphics and references. |
| Discrete_Plane_Symmetry_Groups Web text by Ana Kozomara. |
| Escher_Web_Sketch Java applet drawing repeated patterns with selected symmetry. |
| Frieze_Patterns Definitions and images. |
| Gallery_of_Symmetric_Chaos Includes: Symmetric icons and fractals; Quilts and planar repeating patterns; Colored wallpaper patterns. |
| The_Geometry_Junkyard__Tilings A collection of links. |
| Grotesque_Geometry Andrew Crompton's tiling and tessellation images. |
| Hans_Kuiper Hans Kuiper's work. Tessellations and optical art. Also tessellation software with the 17 wallpaper groups. |
| Hop\'s_Escher_Tessellation_Tiles Escher-like tessellations. |
| Hyperbolic_Tessellations Explanations and graphics. |
| Investigating_Patterns__Symmetry_and_Tessellations Links to activities and other resources. |
| Java_Kali A program for drawing symmetrical patterns based on any of the 17 wallpaper groups, as well as several frieze and rosette groups. |
| Java_Penrose_Tiler A Java applet for experimenting with kites and darts. |
| KaleidoTile Software for Macintosh and SGI to create and manipulate tessellations of the sphere, Euclidean plane and hyperbolic plane, and to see how the Platonic solids are related to tessellations. |
| Landry_Art Art of Kenneth Landry. Tessellations, polyhedra and polyhedra decorated with tessellations. |
| Mike_Field University of Houston. Graphics and resources in symmetry and tiling. |
| Penrose_Tiles Links in the Geometry Junkyard. |
| The_Penrose_Tiling_at_Miami_University A summary of the history behind the Penrose tiling in the math department at Miami university. |
| Pentagons_that_Tile_the_Plane Known solutions and a new recipe. |
| Quasi-Periodic_Tilings Artist Eleni Mylonas uses tilings. |
| References_about_Tessellations Compiled by Doris Schattschneider, Moravian College. |
| Samantha\'s_Wallpaper_Page Wallpaper patterns and symmetry groups. |
| The_Seventeen_Wallpaper_Groups Examples in traditional Japanese patterns. |
| Squared_Squares_and_Squared_Rectangles Tilings of Squared Squares and Squared Rectangles, constructed using javascript. |
| Symmetries,_Patterns_and_Tessellations Constructed with Geometer's Sketchpad by Allan Bergmann Jensen. |
| Symmetry_and_Pattern__The_Art_of_Oriental_Carpets Resources compiled by the Math Forum. |
| Symmetry_and_the_Shape_of_Space With interactive demos using Geometer's Sketchpad (requires Macintosh). |
| Symmetry_and_the_Shape_of_Space Chaim Goodman-Strauss, Arkansas. With interactive demos using Geometer's Sketchpad (requires Macintosh). |
| TESS Tessellation software. 11 rosette, all 7 frieze and all 17 wallpaper groups included. |
| Tessellated,_Interlocking_Concrete_Pavers_and_Molds Pictures of some concrete tilings. |
| Tessellating_Wallpaper_Patterns Original tessellating desktop wallpaper tiles. |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ ° 