His Ph.D. thesis was on mathematical logic, and we shall discuss it further in a moment, but first let us note that Post wrote a second paper as a postgraduate, which was published before his first paper, and this was a short work on the functional equation of the gamma function.
Ang kanyang Ph.D. tesis ay sa matematikal na lohika, at kami ay dapat pag-usapan ito pa sa isang saglit, ngunit una sa amin na tandaan Post wrote isang pangalawang papel bilang isang postgradweyt, na kung saan ay nai-publish bago ang kanyang unang papel, at ito ay isang maikling trabaho sa functional equation ng ang gama function.