Hermann Wiener

In 1881 he received his Promotion (PhD) in Munich in mathematics with a thesis Über Involutionen auf ebenen Curven (On involutions on plane curves) under the supervision of Ludwig Seidel.

In 1885 Hermann Wiener habilitated at the Martin Luther University of Halle-Wittenberg with a thesis Rein geometrische Theorie der Darstellung binärer Formen durch Punktgruppen auf der Geraden (Purely geometrical theory of the representation of binary forms by point groups on the line).

[1] Although Wiener is not explicitly credited with influencing Hilbert in his championing of the axiomatic method, it is still worth noting that he gave the talk Über Grundlagen und Aufbau der Geometrie ... to the German Mathematical Society which was published in the first volume of the Jahresberichte der Deutschen Mathematiker vereinigung ... (1892).

Wiener proposed that geometry be studied without using visual images, but rather by abstract axiomatic methods.

He also joined his father in the creation of mathematical models of geometric surfaces, constructed from plaster and wire.