6 ideas
17833 | The first-order ZF axiomatisation is highly non-categorical [Hallett,M] |
17834 | Non-categoricity reveals a sort of incompleteness, with sets existing that the axioms don't reveal [Hallett,M] |
17837 | Zermelo allows ur-elements, to enable the widespread application of set-theory [Hallett,M] |
19406 | I strongly believe in the actual infinite, which indicates the perfections of its author [Leibniz] |
17836 | The General Continuum Hypothesis and its negation are both consistent with ZF [Hallett,M] |
14963 | Surely the past phases of a thing are not parts of the thing? [Broad] |