Add Parametric Morphism {R : ConstructiveReals} : CRmin
with signature (CReq R) ==> (CReq R) ==> (CReq R)
as CRmin_morph.
#[global]
Instance CRmin_morphT
: forall {R : ConstructiveReals},
CMorphisms.Proper
(CMorphisms.respectful (CReq R) (CMorphisms.respectful (CReq R) (CReq R))) (@CRmin R).

Lemma CRmin_left : forall {R : ConstructiveReals} (x y : CRcarrier R),
x <= y -> CRmin x y == x.