5 ideas
3340 | Von Neumann defines each number as the set of all smaller numbers [Neumann, by Blackburn] |
3355 | Von Neumann wanted mathematical functions to replace sets [Neumann, by Benardete,JA] |
22716 | Von Neumann defined ordinals as the set of all smaller ordinals [Neumann, by Poundstone] |
490 | Everything happens by reason and necessity [Leucippus] |
20698 | Irenaeus says evil is necessary for perfect human development [Irenaeus, by Davies,B] |