Chaim L. Pekeris joined the Weizmann Institute as head of its Department of Applied Mathematics in 1949. He died in Rehovot, Israel on February 24, 1993. Chaim L. Pekeris Chaim Leib Pekeris (June 15, 1908 – February 24, 1993) was an Israeli-American physicist and mathematician. He made notable contributions to geophysics and the spectral theory of many-electron atoms, in particular the Helium atom. He was also one of the designers of the first computer in Israel, WEIZAC. Pekeris was born in Alytus, Vilna Governorate. With the assistance of his uncle, Pekeris and his two brothers emigrated to the United States around 1925. He
World Union of Jewish Students highlighting the plight of German Jewry, the opening session was presided over by the renowned British philosopher Samuel Alexander who finished his opening statement with the line "I have become a Zionist", which was met with wild applause. It was decided at the congress that Einstein would remain President alongside a group of Vice-Presidents that would include Chaim Bialik, Sigmund Freud and Chaim Weizmann. Maurice Perlzweig, a young, British Liberal rabbi, was elected chairperson at the 1933 Congress. By 1936, Perlzweig was also a leader of both the Zionist Organization and the World Jewish Congress, which he had helped to