Vladimir Arnold — math (legend) with roots in the Fluent
Vladimir Arnold was a Soviet-Russian mathematician born in Odessa who solved Hilbert's 13th problem at age 19 and went on to make foundational contributions to dynamical systems, topology, and mathematical physics. He spent his later career in France at the Université Paris-Dauphine.
Tracing the roots — USSR
Born in Odessa (USSR) in 1937, Arnold trained under Andrei Kolmogorov at Moscow State University and became one of the most prolific and celebrated mathematicians of his generation. His KAM theory (Kolmogorov-Arnold-Moser) — foundational to mathematical physics — and his work in catastrophe theory and topology place him among the very greatest mathematical minds of the 20th century.