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Commit 2021-02-16 09:30 dc917df7

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feat(category/limits/shapes/zero): lemmas about is_isomorphic 0 (#6251)

Estimated changes

Modified src/category_theory/limits/shapes/zero.lean

added def category_theory.limits.iso_of_is_isomorphic_zero

added theorem category_theory.limits.zero_of_source_iso_zero'

added theorem category_theory.limits.zero_of_target_iso_zero'