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World Earthquake Report for Sunday, 26 July 2026
• Moderate mag. 4.5 earthquake - Estado de Veracruz-Llave, Mexico, on 2026-07...
• Volcano earthquake report for Sunday, 26 Jul 2026
• Moderate mag. 4.0 earthquake - Kabupaten Kepulauan Talaud, 148 km northeast...
• Light mag. 3.9 earthquake - North Pacific Ocean, 65 km south of Puerto San ...
• Strong mag. 5.4 earthquake - Northern Mid-Atlantic Ridge on Sunday, Jul 26,...
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#438568
Fri 29 Sep 2017 03:50:PM
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Joined: Feb 2001
Posts: 678,976
Launch Director
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OP
Launch Director
Joined: Feb 2001
Posts: 678,976 |
Tiling the plane with a single pattern is a mathematical problem that has interested humans since Antiquity, notably for the aesthetic quality of tiles in mosaics or tiling. One of the unresolved problems in this field that has been puzzling the scientific community since 1918 has now been definitively resolved. Source: There are only 15 possible pentagonal tiles
David Cottle
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Entire Thread
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There are only 15 possible pentagonal tiles
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Copyright 1996 - 2026 by David Cottle. Designed by David Bate Jr. All Rights Reserved.
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