In fact he attended Weierstrass 's lectures on the theory of elliptic functions (which was Weierstrass 's main research topic) and many years later published his account of these lectures.
Sa katunayan siya nag-aral Weierstrass' s lektura sa teorya ng tambilugin function (na kung saan ay Weierstrass' s main research paksa) at maraming mga taon mamaya-publish na ang kanyang account ng mga lektura.