A set is a collection into a whole of definite distinct objects of our intuition or of our thought. The objects are called the elements (members) of the set. - Georg Cantor, 1897 | ||
From the paradise which Cantor created, no one shall be able to expel us - David Hilbert, 1926 | ||
From then on, the weirdest monsters of thought were conceivable as sets (Hilbert's paradise). |