Sigmund Gundelfinger

Sigmund Gundelfinger (14 February 1846 in Kirchberg an der Jagst – 13 December 1910 in Darmstadt) was a German-Jewish mathematician who introduced the Gundelfinger quartic and proved the completeness of the invariants of a ternary cubic.

Gundelfinger quartic
In mathematics, the Gundelfinger quartic is a quartic surface in projective space studied by.