Studied mathematics and physics and astronomy at the University of Amsterdam. Received a Ph.D. in 1963 for the thesis Extension problems in intuitionistic plane Projective geometry....
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Studied mathematics and physics and astronomy at the University of Amsterdam. Received a Ph.D. in 1963 for the thesis Extension problems in intuitionistic plane Projective geometry. Taught logic and mathematics at MIT and Oxford. Professor at the University of Utrecht. Received the Academy Medal 2003 for bringing the works of Brouwer to international attention.