7 ideas
9987 | An aggregate in which order does not matter I call a 'set' [Bolzano] |
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] |
10856 | A truly infinite quantity does not need to be a variable [Bolzano] |
17836 | The General Continuum Hypothesis and its negation are both consistent with ZF [Hallett,M] |
5996 | Critolaus redefined Aristotle's moral aim as fulfilment instead of happiness [Critolaus, by White,SA] |