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Proof step 1 from proof rm-rm (conclusion)

⊦ rmdup(rmdup(x)) = rmdup(x)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ ¬ dups(x) → rmdup(x) = x

Rule argument

spec: list-dup inst: name: rm-eq seq: ⊦ ¬ dups(x) → rmdup(x) = x subst: [x] → [rmdup(x)] flags: rewrite, current

Additional information

Used simplifier rules: rm-nodups: ⊦ ¬ dups(rmdup(x)); Used terms: rmdup(x)