He had already taken Denjoy 's advice and submitted his published papers, with some minor improvements, for a doctorate, and this was awarded in 1940.
Siya ay nakuha na Denjoy 's payo at nai-publish na isinumite ng kanyang mga papeles, kasama ang ilang mga menor de edad na pagpapabuti, para sa isang titulo ng doktor, at ito ay iginawad sa 1940.