Wilhelm Wirtinger (1865-1945). Born in Ybbs, Austria.
Studied mathematics at the University of Vienna. Received his
doctorate in 1887, and continued his studies at the Universities of
Berlin and of Göttingen. From 1895 a full professor at the
University of Vienna, but accepted professorship at University of
Innsbruck, returning to Vienna only in 1905. Wrote an important
paper on the general theta function and had an exceptional range in
mathematics (function theory, algebra, number theory, plane
geometry, theory of invariants).