Mathematicians have found a new type of flooring pentagonal

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
RGO expedition returned from the islands in the Gulf with unique discoveries

• Scientists said the discovery of a new type of human »»»
Scientists said on Wednesday the existence of previously unknown species of man.
• Scientists have found in Western Siberia common ancestor of modern Chinese and French »»»
NOVOSIBIRSK, October 30. / TASS /. Genome oldest modern humans (Homo sapiens sapiens).
• Mathematician Perelman said he had not refused a million dollars »»»
Russia mathematician Grigory Perelman, awarded the Millennium Prize for proof of the Poincare conjecture, thinking about the money.
• Russia's mathematics, Perelman was awarded the Millennium Prize »»»
Russia mathematician Grigori Perelman was awarded prizes Clay Mathematics Institute (Massachusetts) for the proof of the Poincare conjecture, the report said the institute.
• Linguists have discovered a 6,909 th language of mankind »»»
Expedition linguists, organized by National Geographic, found in the state of Arunachal Pradesh in northeastern India, a previously unknown language, akin to the Chinese, Tibetan and Burmese.