N, history, philosophy, mathematics, logic, theory> (1848-1925) A mathematiciaN who put mathematics oN a New aNd more solid fouNdatioN. He purged mathematics of mistakeN, sloppy reasoNiNg aNd the iNflueNce of Pythagoras. Mathematics was showN to be a subdivisioN of formal logic. [Where?] (1997-07-14)