He took his family to Oberwolfach and together with mathematicians from military establishments and colleagues from Freiburg, including Behnke and Seifert, they made up a team of about twenty who lived there until the war ended:
Siya kinuha sa kanyang pamilya sa Oberwolfach at kasama ng mga mathematicians mula sa militar establishments at kasamahan mula sa Freiburg, kabilang ang mga Behnke at Seifert, sila ay binubuo ng isang koponan ng tungkol sa loob ng dalawampu't na nanirahan doon hanggang natapos ang digmaan: