(0) Obligation:

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

f(a) → f(a)
ab

Q is empty.

(1) QTRSRRRProof (EQUIVALENT transformation)

Used ordering:
Recursive Path Order [RPO].
Precedence:
a > b
With this ordering the following rules can be removed by the rule removal processor [LPAR04] because they are oriented strictly:

ab


(2) Obligation:

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

f(a) → f(a)

Q is empty.