Leon Chwistek
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Leon Chwistek was a Polish logician, philosopher, mathematician, avant-garde painter, theoretician of modern art and literary critic.
Chwistek, c. 1907–1912
Portrait of Leon Chwistek by Witkacy, 1913
Fencing, 1919
Portrait of Tytus Czyżewski, c.1920
Alfred Tarski
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Alfred Tarski was a Polish-American logician and mathematician. A prolific author best known for his work on model theory, metamathematics, and algebraic logic, he also contributed to abstract algebra
Leon Chwistek
…1930, Chwistek was appointed Professor of Logic in the Department of Mathematical nad Natural Sciences at the University of Lwów in a position for which Alfred Tarski had also applied but on Bertrand Russell's recommendation it was offered to Chwistek. He visited the famous Scottish Café where he debated with such…
Tarski in 1968
Atop four pillars at entrance to Warsaw University Library stand statues of Lwów-Warsaw School philosophers (right to left) Kazimierz Twardowski, Jan Łukasiewicz, Alfred Tarski, Stanisław Leśniewski.
Alfred Tarski at Berkeley