2 Hryvni (M. Boholyubov) – Ukraine

A dark background shows diagrams and formulas from nonlinear oscillation theory, topped by Ukraine’s Small Coat of Arms, the inscription “National Bank of Ukraine,” and the Mint logo. Below, on a light background, are the face value (2 Hryvni) and the issue year.

A portrait of N. Bogolyubov is centered against a light background with a formula fragment. Below, on a dark background, is the semicircular legend "Mykola Boholiubov" with his life years 1909 (left) and 1992 (right).