Aleksey Vasilyevich Letnikov was a Russian mathematician.
After graduating from the Konstantinovsky Land-Surveying Institute in Moscow, Letnikov attended classes at Moscow University and the Sorbonne. In 1860 he became an Instructor of Mathematics... Wikipedia
Born: January 13, 1837, Moscow, Russia
Died: 1888 (age 51 years), Moscow, Russia
Education: Moscow State University