---- CR(R cup S)
---- [Klein and Hirokawa, 2012]
R:
H(H(x)) -> K(x)
H(K(x)) -> K(H(x))
S:

CP_S(R):
H(K(___y58)) -> K(H(___y58))
H(K(H(___y62))) -> K(K(___y62))
CR(S):
see below.

---- CR(R)
---- [Hirokawa and Middeldorp, 2011]
R:

CPS'(R):

CP(R):