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Proof step 1 from proof zero-gels (conclusion)

⊦ i < 0 ∧ 0 ≤ j → ¬ j < i

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: le-def: ⊦ i ≤ j ↔ ¬ j < i;%lst: ⊦ i < j ∧ ¬ i0 < j → ¬ i0 < i; from specification int-basic1