Franciszek Leja

Franciszek Leja ( born January 27, 1885 in Grodzisko Górne, † October 11, 1979 in Kraków ) was a Polish mathematician of Krakow mathematician school. His interest was mainly analytical functions.

Leja studied mathematics, physics and Philosophical at the Jan Kazimierz University in Lvov and 1909 amongst others with Professor Józef Puzyna ( 1856-1919 ) and Marian Smoluchowski ( 1872-1917 ).

From 1910 to 1923 Leja was a high school teacher of Mathematics and Physics in Cracow. He then became a professor at the University of Warsaw in 1924 and 1936 at the Jagiellonian University. On November 6, 1939 he was arrested with another 183 Cracow professors under Promotions Krakow and deported to the Sachsenhausen concentration camp, where he was detained until May 1940. After his release, he became involved in the underground university and wrote mathematical textbooks. Since 1948 he worked at the Mathematics Institute of the Polska Akademia Nauk. He was co-founder in 1919 of the Polish Mathematical Society and its president from 1963 to 1965. In 1931 he became a member of the Warsaw Scientific Society.

Works (selection)

• Geometria analityczna i początki geometrii różniczkowej, Kraków 1934.
• Geometria analityczna, Kraków 1946.
• Rachunek różniczkowy i całkowy ze wstępem do równań różniczkowych, Kraków 1947
• Funkcje analityczne i harmoniczne, Kraków 1948.
• Geometria analityczna, cz. 1, Geometria Płaska, Gdańsk 1949.
• Geometria analityczna, Warszawa 1954
• Funkcje analityczne harmoniczne i, t. I, Warszawa 1952
• Teoria funkcji analitycznych, Warszawa 1957.
• Funkcje zespolone, Warszawa 1967