Aleksandr Danilovich Aleksandrov (Russian: Алекса́ндр Дани́лович Алекса́ндров, alternative transliterations: Alexandr or Alexander (first name), and Alexandrov (last name)) (4 August 1912 – 27 July 1999) was a Soviet/Russian mathematician, physicist, philosopher and mountaineer.

His advisors there were Vladimir Fock, a physicist, and Boris Delaunay, a mathematician.

In 1933 Aleksandrov worked at the State Optical Institute (GOI) and at the same time gave lectures at the Department of Mathematics and Mechanics of the university.

One of his main contributions was the attempted move of Leningrad State University to Old Peterhof, which proved unsuccessful.

In 1986 he returned to Leningrad (now Saint Petersburg) to head the geometry laboratory at LOMI.

Aleksandrov wrote a multitude of books, scientific papers, textbooks for various levels (schools to universities), including Convex Polyhedra, originally published in Russian in 1950 and translated into English in 2005.

He also wrote non-mathematical papers, memoirs about famous scientists, and philosophical essays dealing with the moral values of science.

Finally, in 1982, the year of his seventieth birthday, he, together with K. Tolstov, performed in Tian Shan his last climb, of the Panfilov Peak…[9]