fact: Definition grp_image_quotient : A / grp_kernel phi $-> grp_image phi.
imports: Basics Types Truncations.Core Algebra.Congruence Algebra.Groups.Group Algebra.Groups.Subgroup Algebra.Groups.Image Algebra.Groups.Kernel Colimits.Quotient HSet Spaces.Finite.Finite WildCat Modalities.Modality