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feat(topology/subset_properties): fintype.compact_space #1786

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merged 2 commits into from
Dec 6, 2019

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Finite topological spaces are compact.

Finite topological spaces are compact.
@PatrickMassot PatrickMassot added the ready-to-merge All that is left is for bors to build and merge this PR. (Remember you need to say `bors r+`.) label Dec 6, 2019
@@ -328,6 +328,11 @@ begin
rw nhds_prod_eq, exact le_inf ha hb
end

/-- Finite topological spaces are compact. -/
instance fintype.compact_space [fintype α] : compact_space α :=
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Aren't you supposed to use a lower priority, like 100, as this instance always applies? I guess the linter will complain.

@mergify mergify bot merged commit 8ca9263 into master Dec 6, 2019
@mergify mergify bot deleted the jcommelin-patch-3 branch December 6, 2019 16:25
anrddh pushed a commit to anrddh/mathlib that referenced this pull request May 15, 2020
anrddh pushed a commit to anrddh/mathlib that referenced this pull request May 16, 2020
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3 participants