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Proof step 3 from proof lsfc-02 (previous step)

i / i0 + j / i0 < 0, 0 < i0, 0 ≤ i + j ⊦

User applied rule insert lemma

And obtained the following new goals

Proof step 4:
0 < i0, i / i0 + j / i0 < 0 ⊦ i + j < 0

Rule argument

spec: <toplevel> name: zero-04 seq: 0 < i0, i / i0 + j / i0 < 0 ⊦ i + j < 0 subst: [i0, i, j] → [i0, i, j]

Additional information

Used simplifier rules: ⊦ i ≤ j → ¬ j < i; (s) Used terms: i0, i, j