After two years as an adjunct professor at U. of Texas, with the aid of a Guggenheim fellowship Whyburn spent the academic year 1929/1930 in Vienna with Hans Hahn and in Warsaw with Kuratowski and Sierpinski.
Moreover, with Alfred Tarski and Wacław Sierpiński he provided most of the theory concerning Polish spaces (that are indeed named after these mathematicians and their legacy).
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Since Janiszewski was deceased, Kuratowski's supervisor was Wacław Sierpiński.
Honorary Degrees: Lwów (1929), St. Marks of Lima (1930), Amsterdam (1931), Tarta (1931), Sofia (1939), Prague (1947), Wrocław (1947), Lucknow (1949), and Moscow (1967).
Wacław Sierpiński | Wacław Sieroszewski | Wacław Przeździecki | Wacław Jędrzejewicz | Sierpinski triangle |