died in 1953. After his death, the importance of his work to the development of Polish mathematics was recognized by many scientists. A telegram addressed to his family by Bronisław Knaster, Edward Marczewski, Hugo Steinhaus, and Władysław Ślebodziński expressed this recognition: "[W]e wish to express to the family of Professor Kazimierz Żorawski our deep compassion. He was the first of the scientists of his generation to bring the name of Poland to the forefront of world mathematics." Accomplishments Kazimierz Żorawski dealt with a particularly difficult field of mathematics – continuous invariants of Lie groups, and the results of his work have been applied to other fields of mathematics and science, especially differential equations, geometry and physics. The seventy scientific works of Professor Żorawski relate mainly to analytical geometry, differential geometry, Lie groups, differential equations, kinematics of continuous symmetry, and non-Euclidean complex geometry. Kraków School of Mathematics At the turn of the 20th century, groups of mathematicians worked in the Polish scientific centers of Lwów, Kraków and Warsaw and created the "mathematical Schools" of Warsaw, Lwów and Kraków. Kazimierz Żorawski, along with Stanisław Zaremba, (both faculty members of Jagiellonian University) was a cofounder of the Kraków School of Mathematics, to which professors Franciszek Leja, Władysław Ślebodziński and Tadeusz Ważewski also belonged. Thus, Jagiellonian became the center of traditional analysis of differential equations and analytical functions. Polish Mathematical Society On April 2, 1919, Żorawski chaired the inaugural meeting, in Kraków, of the Mathematical Society, which soon changed its name to the Polish Mathematical Society. Żorawski is considered one of the key founders of this Society. Development of Polish mathematics In 1958, Polish Mathematical Society member Władysław Ślebodziński recalled the importance of the role played by Stanisław Zaremba and Kazimierz Żorawski in the development of Polish mathematics: Lie groups Żorawski was a student of eminent Norwegian professor Sophus Lie, the author of the theory of continuous groups (Lie groups). Żorawski developed several areas close to the theory of Lie groups and other theories which were based upon it—in particular the theories of differential equations and differential geometry, as well as topics from the theory of integral invariants (new at that time), and selected problems of kinematics. While a professor in Leipzig, Lie wrote the following regarding Żorawski's work devoted to Lie groups: Personal life In 1863, Żorawski's mother, Kazimiera, took part in the January Uprising against the Russian Empire. This uprising started as