mathlib
ec9d5204 - feat(order/filter,*): lemmas about `filter.ne_bot` (#9234)

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4 years ago
feat(order/filter,*): lemmas about `filter.ne_bot` (#9234) * add `prod.range_fst`, `prod.range_snd`, `set.range_eval`; * add `function.surjective_eval`; * add `filter.*_ne_bot` and/or `filter.*_ne_bot_iff` lemmas for `sup`, `supr`, `comap prod.fst _`, `comap prod.snd _`, `coprod`, `Coprod`.
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