5 ideas
9616 | A set is a collection into a whole of distinct objects of our intuition or thought [Cantor] |
15896 | Cantor needed Power Set for the reals, but then couldn't count the new collections [Cantor, by Lavine] |
9145 | We form the image of a cardinal number by a double abstraction, from the elements and from their order [Cantor] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |