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Proof step 12 from proof valid-eraseq-strong-imp-p (
previous step
)
⊦ valid-eraseq(apebs, eqent ' + q) ↔ eqent.pnum < # apebs ∧ (valid-peb(apebs[eqent.pnum]) → eqent.lebref = apebs[eqent.pnum].vidhdr.vol × apebs[eqent.pnum].vidhdr.leb) ∧ valid-eraseq(apebs, q)
A spec-lemma