What nationality was the Lax pair's namesake?
Lax pair In mathematics, in the theory of integrable systems, a Lax pair is a pair of time-dependent matrices or operators that satisfy a corresponding differential equation, called the "Lax equation". Lax pairs were introduced by Peter Lax to discuss solitons in continuous media. The inverse scattering transform makes use of the Lax equations to solve such systems.
Dolly Sisters Rose "Rosie" Dolly (October 25, 1892 – February 1, 1970) and Jenny Dolly (October 25, 1892 – June 1, 1941), known professionally as The Dolly Sisters, were Hungarian-American identical twin dancers and actresses.