Felix Gantmacher (23 February 1908, Odessa

Odessa

Odessa or Odesa is the administrative center of the Odessa Oblast located in southern Ukraine. The city is a major seaport located on the northwest shore of the Black Sea and the fourth largest city in Ukraine with a population of 1,029,000 .The predecessor of Odessa, a small Tatar settlement,...

 – 16 May 1964) was a Soviet  mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

, professor at Moscow Institute of Physics and Technology, well-known for his contributions in mechanics, matrix theory and Lie group

Lie group

In mathematics, a Lie group is a group which is also a differentiable manifold, with the property that the group operations are compatible with the smooth structure...

 theory.
In 1925–1926 he participated in seminar guided by Nikolai Chebotaryov

Nikolai Chebotaryov

Nikolai Chebotaryov was a noted Russian and Soviet mathematician. He is best known for the Chebotaryov density theorem....

in Odessa and wrote his first research paper in 1926.

His book Theory of Matrices (1953) is a bible of matrix theory. It has been translated into various languages including English
2 volume translation.
With Mark Krein another significant book has been published.
In the paper
he contributed to the classification problem of the real Lie algebra

Lie algebra

In mathematics, a Lie algebra is an algebraic structure whose main use is in studying geometric objects such as Lie groups and differentiable manifolds. Lie algebras were introduced to study the concept of infinitesimal transformations. The term "Lie algebra" was introduced by Hermann Weyl in the...

s,
in paper
to automorphisms theory of the complex Lie algebras.

His son Vsevolod Gantmacher is a noted physicist.