Victor (Viktor) Abramovich Zalgaller (Hebrew: ויקטור אבּרמוביץ' זלגלר; Russian: Виктор Абрамович Залгаллер; 25 December 1920 – 2 October 2020) was a Russian-Israeli mathematician in the fields of geometry and optimization.

He is best known for the results he achieved on convex polyhedra, linear and dynamic programming, isoperimetry, and differential geometry.

[1] In 1936, he was one of the winners of the Leningrad Mathematics Olympiads for high school students.

He started his studies at the Leningrad State University, however, World War II intervened in 1941, and Zalgaller joined the Red Army.

[2] He worked as a teacher at the Saint Petersburg Lyceum 239,[3] and received his 1963[4] doctoral dissertation on polyhedra with the aid of his high school students who wrote the computer programs for the calculation.