Quotations

Richard Dedekind

As professor in the Polytechnic School in Zürich I found myself for the first time obliged to lecture upon the elements of the differential calculus and felt more keenly than ever before the lack of a really scientific foundation for arithmetic.

Opening of the paper in which Dedekind cuts were introduced.

Numbers are the free creation of the human mind.

What is provable is not to be believed without proof in science.

Was sind und was sollen die Zahlen? (1888)