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Proof step 3 from proof indices-set-erasing (previous step)

indices-erasing(wlar, nx) ⊦ indices-erasing(wlar[m, wl-entry(n, erasing)], nx)

Heuristic structural induction applied rule structural induction

And obtained the following new goals

Proof step 4:
indices-erasing(wlar, m0 + nx0), ∀ wlar, m, n. indices-erasing(wlar, nx0) → indices-erasing(wlar[m, wl-entry(n, erasing)], nx0) ⊦ indices-erasing(wlar[m, wl-entry(n, erasing)], m0 + nx0)

Rule argument

term: nx

Additional information

Used simplifier rules: indices-erasing-base: ⊦ indices-erasing(wlar, []);%nat-list freely generated by [], +;;