Kazimierz Żorawski
Paulin Kazimierz Stefan Żorawski (June 22, 1866 – January 23, 1953) was a Polish mathematician. Żorawski's main interests were invariants of differential forms, integral invariants of Lie groups, differential geometry and fluid mechanics. His work in these disciplines was to prove important in other fields of mathematics and science, such as differential equations, geometry and physics (especially astrophysics and cosmology).