Lev Schnirelmann, Date of Birth, Place of Birth, Date of Death

Lev Schnirelmann

Russian mathematician

Date of Birth: 02-Jan-1905

Place of Birth: Gomel, Belarus

Date of Death: 24-Sep-1938

Profession: mathematician, topologist

Zodiac Sign: Capricorn

Lev Genrikhovich Schnirelmann (also Shnirelman, Shnirel'man; ??? ??´???????? ?????????´?; January 2, 1905 – September 24, 1938) was a Soviet mathematician who worked on number theory, topology and differential geometry. He sought to prove Goldbach's conjecture.
In 1930, using the Brun sieve, he proved that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant.His other fundamental work is joint with Lazar Lyusternik.
Together, they developed the Lusternik–Schnirelmann category, as it is called now, based on the previous work by Henri Poincaré, David Birkhoff, and Marston Morse.
The theory gives a global invariant of spaces, and has led to advances in differential geometry and topology.
They also proved the theorem of the three geodesics, that a Riemannian manifold topologically equivalent to a sphere has at least three simple closed geodesics. Schnirelmann graduated from Moscow State University (1925) and then worked in Steklov Mathematical Institute (1934–1938).
His advisor was Nikolai Luzin. According to Pontryagin's memoir, Schnirelmann committed suicide in Moscow.