By the time he was seventeen, although he was still at school, he began to attend lectures by Dirichlet and other mathematicians at the University of Berlin.
Ng oras siya ay labimpito, kahit na siya ay pa rin sa paaralan, siya ay nagsimulang dumalo sa lektura sa pamamagitan ng Dirichlet at iba pang mga mathematicians sa Unibersidad ng Berlin.