He was promoted to extraordinary professor of mathematics in 1888, then he was appointed as ordinary professor (full professor) in 1892 at the German University of Prague.
Siya ay itaas sa mga katangi-tangi propesor ng matematika sa 1888, at pagkatapos, siya ay hinirang bilang karaniwang propesor (buong propesor) sa 1892 at ang German Unibersidad ng Prague.