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Proof step 4 from proof indices-erasing-at (previous step)

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

Heuristic structural induction applied rule structural induction

And obtained the following new goals

Proof step 5:
wlar[n] = wl-entry(m, stat), indices-erasing(wlar, m0 + nx0), n ∈ m0 + nx0, ∀ wlar, n, m, stat. wlar[n] = wl-entry(m, stat) ∧ indices-erasing(wlar, nx0) ∧ n ∈ nx0 → stat = erasing ⊦ stat = erasing

Rule argument

term: nx

Additional information

Used simplifier rules: nat-list freely generated by [], +;;% ⊦ ¬ n ∈ []; (s)