Lyudmila Vsevolodovna Keldysh (Russian: Людмила Всеволодовна Келдыш; 12 March 1904 – 16 February 1976) was a Soviet mathematician known for set theory and geometric topology.
Vsevolod took a position there at the Riga Polytechnic Institute, until the German invasion of 1915 forced the family to flee to Moscow, where they lived in the Losinoostrovsky District.
[5][6] She had continued her research on Borel sets and in 1941 defended her thesis, but before she received her degree the family fled the advancing German troops.
Most of the faculty of the Institute of the Academy of Sciences were considered evacuees when they arrived in Kazan, but Keldysh and her three sons were treated as refugees.
She published a paper, On the structure of measurable sets B in 1944, and followed it in 1945 with Open mappings of A-sets, which marked a turning point in her work.
[4] In 1964, Keldysh was made a full professor[4] at Moscow State University and in 1966 she published the book Topological embeddings into Euclidean space to help her students understand her lectures.