George François Cornelis Griss (30 January 1898, Amsterdam – 2 August 1953, Blaricum), usually cited as G. F. C. Griss, was a Dutch mathematician and philosopher, who was occupied with hegelian idealism and Brouwers intuitionism and stated a negationless mathematics.Griss was a student of L E J Brouwer and formulated an intuitionism based on a hegelian idealism. He obtained his PhD with Roland Weitzenböck at the University of Amsterdam in July 1925.