Add Parametric Morphism : CReal_plus
with signature CRealEq ==> CRealEq ==> CRealEq
as CReal_plus_morph.
#[global]
Instance CReal_plus_morph_T
: CMorphisms.Proper
(CMorphisms.respectful CRealEq (CMorphisms.respectful CRealEq CRealEq)) CReal_plus.

Lemma CReal_opp_involutive : forall x:CReal, --x == x.