Times were hard and Moscow had no suitable positions available for Chebyshev but, in 1847, he was appointed to the University of St Petersburg submitting his thesis On integration by means of logarithms.
Times ay mahirap at Moscow ay hindi nababagay na posisyon na magagamit para sa Chebyshev ngunit, sa 1847, siya ay hihirangin upang angkinin ang University of St Petersburg pagsusumite ng kanyang mga sanaysay sa pagkakasama-sama sa pamamagitan ng paggamit ng logarithms.