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[Merged by Bors] - feat(order/filter/lift): a few lemmas about filter.lift' _ powerset#3652
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[Merged by Bors] - feat(order/filter/lift): a few lemmas about filter.lift' _ powerset#3652
filter.lift' _ powerset#3652Conversation
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urkud
commented
Aug 1, 2020
robertylewis
reviewed
Aug 1, 2020
| filter_eq $ set.ext $ by simp only [mem_lift'_sets, monotone_preimage, comap, exists_prop, forall_const, iff_self, mem_set_of_eq] | ||
| filter.ext $ λ s, (mem_lift'_sets monotone_preimage).symm | ||
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| lemma eventually_lift'_powerset {f : filter α} {p : set α → Prop} : |
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| lemma eventually_lift'_powerset {f : filter α} {p : set α → Prop} : | |
| @[simp] lemma eventually_lift'_powerset {f : filter α} {p : set α → Prop} : |
? And possibly below. But I'm not really sure.
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I added two @[simp] attributes but not here: I don't want to simp from eventually to ∃ s ∈ f by default.
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bors merge |
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Pull request successfully merged into master. Build succeeded: |
filter.lift' _ powersetfilter.lift' _ powerset
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