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Proof step 25 from proof pot-isSquare (previous step)

0 < i, 0 < j, even(j) ⊦ isSquare(i), isSquare(i ^ j)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 26:
⊦ even(i) ↔ (∃ j. i = j + j)
Proof step 27:
0 < i, 0 < j, ∃ j0. j = j0 + j0 ⊦ isSquare(i), isSquare(i ^ j)

Rule argument

spec: int-min inst: name: even-def seq: ⊦ even(i) ↔ (∃ j. i = j + j) subst: [i] → [j] flags: rewrite

Additional information

Used terms: j