Perhaps the most fruitful of all the visits he made was to Berlin where the remarkable team of Kummer, Borchardt, Weierstrass and Kronecker were lecturing.
Marahil ang pinaka-kapaki-pakinabang ng lahat ng mga pagbisita na ginawa niya ay sa Berlin kung saan ang pansin ng koponan ng Kummer, Borchardt, Weierstrass at Kronecker ay lecturing.