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Proof step 2 from proof labs (previous step)

⊦ i→n(i) < i→n(j) ↔ abs(i) < abs(j)

User applied rule insert lemma

And obtained the following new goals

Proof step 3:
0 ≤ i, 0 ≤ j ⊦ i→n(i) < i→n(j) ↔ abs(i) < abs(j)
Proof step 4:
⊦ 0 ≤ i ∧ 0 ≤ j, i→n(i) < i→n(j) ↔ abs(i) < abs(j)

Rule argument

spec: intnat inst: name: labsp seq: 0 ≤ i, 0 ≤ j ⊦ i→n(i) < i→n(j) ↔ abs(i) < abs(j) subst: [i, j] → [i, j] flags: current, []

Additional information

Used terms: i, j