He was appointed as an extraordinary professor of mathematics at the University of Rostock and was due to take up his duties in the autumn of 1946 but problems with heating at the university meant that it was closed until the spring of 1947.
Siya ay hihirangin bilang isang katangi-tangi propesor ng matematika sa University of Rostock at noon ay dahil sa umabot sa kanyang tungkulin sa taglagas ng 1946 ngunit ang mga problema sa init at ang unibersidad sinadya na ito ay sarado hanggang sa tagsibol ng 1947.