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Proof step 2 from proof lebrefs-none (previous step)

⊦ # eq-entry(n, none) '.lebrefs = 0, eq-entry(n, none) '.lebrefs = ∅

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ eqent ' = eqent + []
Proof step 4:
⊦ # (eq-entry(n, none) + []).lebrefs = 0, (eq-entry(n, none) + []).lebrefs = ∅

Rule argument

spec: list, inst: erasequeue-base name: One seq: ⊦ eqent ' = eqent + [] subst: [eqent] → [eq-entry(n, none)] flags: <all paths>

Additional information

Used terms: eq-entry(n, none)