EntityQ1228851· pop 6· linked from 21 articlesdiscrete categorySign in to savecategory whose only arrows are identity arrowsConnectionsmorphismEntitylimitEntitymathematicsEntitycategory theoryEntityclassEntityfunctorEntityproductEntitycoproductEntityadjoint functorEntitysubcategoryEntityequivalence of categoriesEntityfunctor categoryEntitydiagramEntityCategoriesCategories in category theory