Edmund Husserl - Husserl's studies and early works. Husserl initially studied mathematics at the universities of Leipzig (1876) and Berlin (1878), under Karl Weierstrass and Leopold Kronecker. In 1881 he went to Vienna to study under the supervision of Leo Königsberger (a former student of Weierstrass), obtaining the Ph.D. in 1883 with the work Beiträge zur Variationsrechnung ...

See also:

Edmund Husserl, Edmund Husserl - Life and works, Edmund Husserl - Husserl's studies and early works, Edmund Husserl - The Elaboration of Phenomenology, Edmund Husserl - Bibliography, Edmund Husserl - Works by Husserl, Edmund Husserl - Works about Husserl

Read more here: » Edmund Husserl: Encyclopedia II - Edmund Husserl - Life and works