What type of profession does Ivan Fesenko and Valery Goppa have in common?
Ivan Fesenko Ivan Fesenko (Russian: Иван Борисович Фесенко ; born 1962) is a mathematician working in number theory and other areas of modern mathematics.
Svyatoslav Vakarchuk Slava Vakarchuk (Ukrainian: Святосла́в Іва́нович Вакарчу́к , born May 14, 1975) is the lead vocalist of Okean Elzy, the most successful post-Soviet rock band in Ukraine. He is the son of Ivan Vakarchuk, a professor of physics at Lviv University and the former Minister of Education and Science in Ukraine.