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Proof step 4 from proof notneg-01 (previous step)

i ^ j = 0, 0 < i, 0 ≤ j ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ 0 < j → (i ^ j = 0 ↔ i = 0)

Rule argument

spec: int-pot inst: name: zero seq: ⊦ 0 < j → (i ^ j = 0 ↔ i = 0) subst: [j, i] → [j, i] flags: rewrite, current

Additional information

Used simplifier rules: Pot-zero: ⊦ j ^ 0 = 1;%lels: ⊦ ¬ i < j ↔ j ≤ i; from specification int-abs%anti: ⊦ i ≤ j → (j ≤ i ↔ i = j); from specification int-abs Used terms: j, i