Erich Hecke (1887 - 1947) - Biography - MacTutor History of

Erich Hecke was a Polish-born German mathematician whose best work was in analytic number theory.

MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd

Combinatorics Wikipedia, PDF, Combinatorics

Mathematician - Chessprogramming wiki

Mathematician - Chessprogramming wiki

ERICH HECKEL (1883-1970), Männerbildnis

Who's That Mathematician? Images from the Paul R. Halmos Photograph Collection

Erich Heckel (1883-1970) – FTN-blog

Erich Heckel (1883-1970) – FTN-blog

ERICH HECKEL (1883-1970), Männerbildnis

Mathematician - Chessprogramming wiki

Erich Heckel (1883 – 1970)

German Expressionist Prints: Erich Heckel (German, 1883-1970), later works

Erich Heckel, 10. Jahresblatt: Küste

Seshat : Charles Jean Gustave Nicolas de La Vallée Poussin

mathtrainer.net: April 2012