Rabbi Dr. Norman Lamm, a professor of Jewish philosophy at Yeshiva University in New York, has been chosen president of the 91-year-old Orthodox institution. Rabbi Lamm fills the position left vacant by the death this year of Rabbi Dr. Samuel Belkin, who headed the university for 33 years. An author, philosopher, chemist, and teacher, the 48-year-old Lamm is the first American-born president of YU. He received his B.A., Ph.D., and rabbinical ordination at the university. In his books and lectures, Rabbi Lamm has urged closer cooperation between the Orthodox Jewish community in the U.S. and the Conservative and Reform movements.