feat(category_theory/products/basic): equivalence ((A ⥤ B) × (A ⥤ C)) ≌ (A ⥤ (B × C)) (#15445)
feat(category_theory/products/basic): equivalence ((A ⥤ B) × (A ⥤ C)) ≌ (A ⥤ (B × C)) (#15445)








leanprover-community/mathlib,leanprover-community/mathlib