n.
School of mathematical thought introduced by the Dutch mathematician Luitzen Egbertus Jan Brouwer (18811966).
In contrast with mathematical Platonism , which holds that mathematical concepts exist independent of any human realization of them, intuitionism holds that only those mathematical concepts that can be demonstrated, or constructed, following a finite number of steps are legitimate. Few mathematicians have been willing to abandon the vast realms of mathematics built with nonconstructive proofs.