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Commit 2021-10-14 13:24 dc23dfa1

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feat(data/equiv/basic): subtype_equiv_psigma (#9688)

depends on: #9687

Estimated changes

Modified src/data/equiv/basic.lean

added def equiv.psigma_equiv_subtype

added def equiv.sigma_plift_equiv_subtype

added def equiv.sigma_ulift_plift_equiv_subtype