6 ideas
17832 | Zermelo showed that the ZF axioms in 1930 were non-categorical [Zermelo, by Hallett,M] |
13028 | Replacement was added when some advanced theorems seemed to need it [Zermelo, by Maddy] |
16974 | The nature of each logical concept is given by a collection of inference rules [Correia] |
17626 | The antinomy of endless advance and of completion is resolved in well-ordered transfinite numbers [Zermelo] |
16973 | Explain logical necessity by logical consequence, or the other way around? [Correia] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |