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Commit 2020-09-25 06:57 143c074c

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feat(category_theory/cofinal): cofinal functors (#4218)

Estimated changes

Modified src/category_theory/is_connected.lean

added theorem category_theory.is_preconnected_induction

Modified src/category_theory/isomorphism.lean

Created src/category_theory/limits/cofinal.lean

added def category_theory.cofinal.cocones_equiv

added def category_theory.cofinal.colimit_cocone_comp

added theorem category_theory.cofinal.colimit_cocone_comp_aux

added def category_theory.cofinal.colimit_cocone_of_comp

added def category_theory.cofinal.colimit_iso'

added def category_theory.cofinal.colimit_iso

added theorem category_theory.cofinal.colimit_pre_is_iso_aux

added def category_theory.cofinal.extend_cocone

added theorem category_theory.cofinal.has_colimit_of_comp

added def category_theory.cofinal.hom_to_lift

added theorem category_theory.cofinal.induction

added def category_theory.cofinal.is_colimit_extend_cocone_equiv

added def category_theory.cofinal.is_colimit_whisker_equiv

added def category_theory.cofinal.lift

added def category_theory.cofinal

Modified src/category_theory/limits/limits.lean

added def category_theory.limits.colimit.iso_colimit_cocone

added theorem category_theory.limits.colimit.iso_colimit_cocone_ι_hom

added theorem category_theory.limits.colimit.iso_colimit_cocone_ι_inv

added theorem category_theory.limits.colimit.pre_eq

added theorem category_theory.limits.is_colimit.of_cocone_equiv_apply_desc

added theorem category_theory.limits.is_colimit.of_cocone_equiv_symm_apply_desc

Modified src/category_theory/over.lean

modified def category_theory.over

modified def category_theory.under

Modified src/category_theory/punit.lean

modified def category_theory.functor.from_punit