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Proof step 11 from proof even-rec (previous step)

i0 + 2 = 2 * j ⊦ i0 = 2 * (j - 1), ∃ j0. i0 = 2 * j0

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Rule argument

spec: int-abs inst: name: elim-sub seq: ⊦ i0 = i - j ↔ i = i0 + j subst: [i, j, i0] → [j, 1, i] flags:

Additional information

Used simplifier rules: ⊦ i0 = i - j ↔ i = i0 + j; (elim) Used terms: j, 1, i