Oleksandr Sharkovsky

Oleksandr Sharkovsky is a Ukrainian mathematician known for his work in the field of dynamical systems and topology. His most notable contribution is the Sharkovsky ordering, which classifies the possible periods of one-dimensional continuous maps, particularly in the context of iterated maps and periodic points. The Sharkovsky theorem provides important insights into the structure and behavior of dynamical systems, especially those arising in mathematical biology and chaos theory.