Mathematician:Mark Grigorievich Krein

Mathematician
Ukrainian mathematician who worked mainly in functional analysis.

Known for works in operator theory (in close connection with concrete problems coming from mathematical physics), the problem of moments, classical analysis and representation theory. Suffered persecution and discrimination for being Jewish.

Nationality
Ukrainian

History

 * Born: 3 April 1907 in Kyiv, Russian Empire (now Ukraine)
 * Died: 17 October 1989 in Odessa, Ukrainian SSR, Soviet Union (now Ukraine)

Theorems and Definitions

 * Krein Space


 * Krein's Condition for Exponential Sums
 * Krein's Condition for Indeterminacy of Moment Problem


 * Krein-Milman Theorem (with )
 * Krein-Rutman Theorem (with )
 * Tannaka-Krein Duality (with )

Also known as
In Ukrainian: Марко́ Григо́рович Крейн

In Russian: Марк Григо́рьевич Крейн