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[Merged by Bors] - feat(ring_theory/perfection): define characteristic predicate of perfection #5386
[Merged by Bors] - feat(ring_theory/perfection): define characteristic predicate of perfection #5386
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What was the rationale for removing this? Is there any other way to obtain this
subring
without having to repeat the proof here?There was a problem hiding this comment.
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The
subring
isn't important, I just want the type with the ring instance.There was a problem hiding this comment.
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But you construct the subring in the other files anyway, don't you?
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No, I just prove that the
subsemiring
is aring
.