His advisor, Richard von Mises, had a strong influence on him, lasting for the rest of his career. In 1933, Bergman was forced to leave his post at the Berlin University because he was a Jew. He fled first to Russia, where he stayed until 1939, and then to Paris.
Bergman's association with Richard von Mises had a profound impact on him, persisting throughout his career. In 1933, Bergman was forced to leave his position at the Berlin University due to his Jewish heritage. He initially sought refuge in Russia, where he resided until 1939, and then relocated to Paris.