User contributions for ヒナゲシさん
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12 October 2021
- 04:2404:24, 12 October 2021 diff hist 0 m Countable Union of Finite Sets is Countable Replaced σ ∘ γ by γ ∘ σ
- 04:0504:05, 12 October 2021 diff hist +834 Talk:Countable Union of Finite Sets is Countable →Regarding the hypothesis $ZF^-$: new section
- 03:2403:24, 12 October 2021 diff hist +103 Countable Union of Finite Sets is Countable Second attempt of clarification [same ideas with different notations, and more detailed]
11 October 2021
- 04:3304:33, 11 October 2021 diff hist −61 Countable Union of Finite Sets is Countable Simplification of the first proof + some small explanations