Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-04-08 06:14 ab60244a

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feat(model_theory/basic,bundled): Structures induced by equivalences (#13124) Defines equiv.induced_Structure, a structure on the codomain of a bijection that makes the bijection an isomorphism. Defines maps on bundled models to shift them along bijections and up and down universes.

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