English
Compatibility of forgetful equivalences between commutative monoids and monoids with forgetful functors to GrpCat.
Русский
Совместимость эквивалентностей забывания между коммутативными моноидами и моноидами через забывающие функторы к GrpCat.
LaTeX
$$$ commMonTypeEquivalenceCommMonForgetGrp $$$
Lean4
/-- The equivalences `Grp_ (Type u) ≌ GrpCat.{u}` and `CommGrp_ (Type u) ≌ CommGrpCat.{u}`
are naturally compatible with the forgetful functors to `GrpCat` and `Grp_ (Type u)`.
-/
noncomputable def commGrpTypeEquivalenceCommGrpForgetGrp :
CommGrpTypeEquivalenceCommGrp.functor ⋙ forget₂ CommGrpCat GrpCat ≅
CommGrp_.forget₂Grp_ (Type u) ⋙ GrpTypeEquivalenceGrp.functor :=
Iso.refl _