Evgenii Landis
Evgenii Mikhailovich Landis was a Soviet mathematician who worked mainly on partial differential equations.Life
Landis was born in Kharkiv, Ukrainian SSR, Soviet Union. He was Jewish. He studied and worked at the Moscow State University, where his advisor was Alexander Kronrod, and later Ivan Petrovsky. In 1946, together with Kronrod, he rediscovered Sard's lemma, unknown in Russia at the time.
Later, he worked on uniqueness theorems for elliptic and parabolic differential equations, Harnack inequalities, and Phragmén–Lindelöf type theorems. With Georgy Adelson-Velsky, he invented the AVL tree data structure.
He died in Moscow. His students include Yulij Ilyashenko.
