Aleksei Pogorelov

Aleksei Vasilyevich Pogorelov, was a Soviet mathematician. Specialist in the field of convex and differential geometry, geometric PDEs and elastic shells theory, the author of novel school textbooks on geometry and university textbooks on analytical geometry, on differential geometry, and on the foundations of geometry.
Pogorelov's uniqueness theorem and the Alexandrov–Pogorelov theorem are named after him.