Yuri Ivanovich Petunin (Russian: Юрий Иванович Петунин) was aSoviet and Ukrainian mathematician. Petunin was born in the city ofMichurinsk(USSR) on September 30, 1937. After graduating from the Tambov State Pedagogical Institute he began his studies at Voronezh State University under the supervision of S.G Krein.He completed his postgraduate studies in 1962, and in 1968 he received hisDoctor of Science Degree, the highest scientific degree awarded in the Soviet Union. In 1970 he joined the faculty of the computational mathematics department at Kyiv State University.