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Proof step 8 from proof is_array-init-01 (previous step)

⊦ r = r0, (∀ j0. ¬ j0 < 0 ∧ ¬ i ≤ j0 → r -- j0 ' ∈ st) ↔ (∀ j. 0 ≤ j ∧ j < i → r -- j ' ∈ st)

User applied rule case distinction

And obtained the following new goals

Rule argument

[CASEDARG : pos: right 2, ()]

Additional information

[[CONCRETESIMPRULES : ()]]