At Basel University Johann took courses in medicine but he studied mathematics with his brother Jacob. Jacob was lecturing on experimental physics at the University of Basel when Johann entered the university and it soon became clear that Johann's time was mostly devoted to studying Leibniz 's papers on the calculus with his brother Jacob.
Sa Basel University Johann kinuha kurso sa medisina ngunit siya-aral ng matematika sa kanyang mga kapatid na lalaki Jacob. Jacob ay lecturing sa experimental physics sa University of Basel kapag Johann ipinasok ang unibersidad at mga ito sa lalong madaling panahon ay naging malinaw na ang Johann ng oras ay mas tapat sa pag-aaral Leibniz 's papeles sa calculus sa kanyang mga kapatid na lalaki Jacob.