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Proof step 9 from proof perm-rev-01 (previous step)

perm(x, y), perm(y, rev(y)) ⊦ perm(x, rev(y))

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: inst: name: trans seq: ⊦ perm(x, y) ∧ perm(y, z) → perm(x, z) subst: [y, z, x] → [y, rev(y), x] flags: rewrite, current

Additional information

Used simplifier rules: perm-rev: ⊦ perm(x, rev(x)); Used terms: y, rev(y), x