|Sofia Kovalevskaya – Russian mathematician.
Illustrated Envelop with special cancellation
|Description||Sofia Vasilyevna Kovalevskaya, born Sofia Vasilyevna Korvin-Krukovskaya (15 January [O.S. 3 January] 1850 – 10 February 1891), was a Russian mathematician who made noteworthy contributions to analysis, partial differential equations and mechanics. She was a pioneer for women in mathematics around the world – the first woman to obtain a doctorate (in the modern sense) in mathematics, the first woman appointed to a full professorship in Northern Europe and one of the first women to work for a scientific journal as an editor. According to historian of science Ann Hibner Koblitz, Kovalevskaia was “the greatest known woman scientist before the twentieth century”.|
|Type||Illustrated Envelop with special cancellation “125 years anniversary of the birth”|
|Used/Unused||Cancellation, Moscow, 15.01.1975|
|Published by/for:||Ministry of Communications, 1974|