7 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] |
16974 | The nature of each logical concept is given by a collection of inference rules [Correia] |
17836 | The General Continuum Hypothesis and its negation are both consistent with ZF [Hallett,M] |
16973 | Explain logical necessity by logical consequence, or the other way around? [Correia] |
20239 | Unlike us, the early Greeks thought envy was a good thing, and hope a bad thing [Hesiod, by Nietzsche] |