Mathematics from the University of Washington in Bothell discovered a new type of pentagonal tilings - convex pentagons that cover a plane without gaps and overlaps. Previously it was only known 14 types of pentagons, the last of which was opened 30 years ago. This publication reports The Guardian.

The problem of finding and classifying parquet of polygons is one of the most relevant in the modern combinatorial geometry. It is known that any triangle and quadrangle cover a plane, and that there are only three types of convex hexagons that can perform the same task.

12 August 2015

A historical revenge. As the Red Army was forced to answer for the Japanese Tsushima

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