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Proof step 3 from proof lst-05 (previous step)

j < j0, i < 0, i < i0 ⊦ i0 < 0, i + j < j0 + i0

User applied rule insert lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: pls seq: i < j, i0 < j0 ⊦ i + i0 < j + j0 subst: [i, j, i0, j0] → [i, i0, j, j0]

Additional information

Used simplifier rules: add-c: ⊦ i + j = j + i; Used terms: i, i0, j, j0