Many well known mathematicians had other occupations : Luca Pacioli ( founder of accounting ) ; Galileo Galilei ; Niccolï¿½ Fontana Tartaglia ( notable engineer and bookkeeper ) ; and Gerolamo Cardano ( one of the founders of probability ) .As time passed , many mathematicians gravitated towards universities .
Some Italian mathematicians had other occupations including One of the greatest scientists ever , Galileo Galilei .