1938 , Sabersky graduated from the Franzosisches Gymnasium , the French High School . He attended from the age of 10 and completed the Abitur at the age of 17 . A classmate of his was noted musicologist Alexander Ringer , professor of music at the University of Illinois . The children left Germany on July 3 , 1938 and the parents soon followed . From Germany the family traveled to Zurich . While waiting for immigration visas to be issued , Sabersky passed the entrance exams and briefly attended the Swiss Federal Technical Institute or ETH Zurich . George Pólya was the proctor for the mathematics examination . The Sabersky family escaped Kristallnacht , which occurred in November 1938
Kristallnacht
Kristallnacht
Rolf Heinrich Sabersky