Quote by Brouwer, Luitzen Egbertus Jan
"Every valid mathematical statement must be constructible by the mind."
"Every valid mathematical statement must be constructible by the mind."
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."
"The intuitionist does not accept the axiom of the excluded middle."
"Creating mathematics is like creating poetry or music."
"The act of intuitively creating a mathematical system requires freedom of thought."