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Proof step 1 from proof unique-sqns-update (conclusion)

m < # apebs ⊦ unique-sqns(apebs) → ( unique-sqns(apebs[m, apeb]) ↔ ¬ valid-peb(apeb) ∨ ¬ apeb.vidhdr.sqn ∈ valid-sqns(apeb.vidhdr.vol, apeb.vidhdr.leb, apebs) \ (valid-peb(apeb.vidhdr.vol, apeb.vidhdr.leb, apebs[m]) ⊃ {apebs[m].vidhdr.sqn} ;∅))

System applied rule normalize

And obtained the following new goals

Proof step 2:
m < # apebs, unique-sqns(apebs) ⊦ unique-sqns(apebs[m, apeb]) ↔ ¬ valid-peb(apeb) ∨ ¬ apeb.vidhdr.sqn ∈ valid-sqns(apeb.vidhdr.vol, apeb.vidhdr.leb, apebs) \ (valid-peb(apeb.vidhdr.vol, apeb.vidhdr.leb, apebs[m]) ⊃ {apebs[m].vidhdr.sqn} ;∅)

Proof step 1 from proof unique-sqns-update (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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