Jan Śleszyński
Ivan Vladislavovich Sleshinsky or Jan Śleszyński was a Polish-Russian mathematician. He was born in Lysianka, Russian Empire to Polish parents.Life
Śleszyński's main work was on continued fractions, least squares and axiomatic proof theory based on mathematical logic. He and Alfred Pringsheim, working separately, proved what is now called the Śleszyński–Pringsheim theorem.
His most important publications include: "Teoria dowodu" in two volumes, and "Teoria wyznaczników" .
Buried at Rakowicki Cemetery.
