---- CR(R cup S)
---- [Klein and Hirokawa, 2012]
R:
F(x,A(G(x))) -> G(F(x,x))
F(x,G(x)) -> G(F(x,x))
A(x) -> x
S:
H(x) -> H(B(H(x)))
CP_S(R):
F(___y2294,G(___y2294)) -> G(F(___y2294,___y2294))
CR(S):
see below.

---- CR(R)
---- [Hirokawa and Middeldorp, 2011]
R:
H(x) -> H(B(H(x)))
CPS'(R):

CP(R):