Termination w.r.t. Q of the following Term Rewriting System could not be shown:

Q restricted rewrite system:
The TRS R consists of the following rules:

f(a) → f(b)
g(b) → g(a)

Q is empty.


QTRS

Q restricted rewrite system:
The TRS R consists of the following rules:

f(a) → f(b)
g(b) → g(a)

Q is empty.