Not only was 1938 significant in that Turán now at least had employment, but it was also the year in which he had his most fruitful mathematical idea. Erdös writes in:
Hindi lamang ay makabuluhan sa 1938 na Turán ngayon ng hindi bababa sa nagkaroon ng trabaho, ngunit ito ay din ang taon kung saan niya ang kanyang mga pinaka-kapaki-pakinabang matematiko ideya. Erdös magsusulat sa: