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Commit 2022-01-06 10:39 54c2567d

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feat(category_theory/sites): The pushforward pullback adjunction (#11273)

Estimated changes

Modified src/category_theory/sites/cover_preserving.lean

added theorem category_theory.compatible_preserving_of_flat

added def category_theory.sites.pullback_pushforward_adjunction

added def category_theory.sites.pushforward