(23699) Paulgordan = 1997 ND3 Paul Albert Gordan (1837-1912) was a German mathematician who taught at the University of Erlangen. He did research in the theory of invariants of algebraic forms, as well as on the substitution groups associated with the solution of algebraic equations.

A complete set of naming citations of the numbered minor planets is
available in the
*Dictionary of Minor Planet Names*,
edited by Lutz Schmadel.