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Proof step 1 from proof ple-02 (conclusion)

i + j0 ≤ j, 0 ≤ j0 ⊦ i ≤ j

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: notle-pos: ⊦ 0 ≤ i ∧ ¬ i0 ≤ j → ¬ i + i0 ≤ j;%add-c: ⊦ i + j = j + i; from specification int-basic2%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2