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Proof step 2 from proof num-issi (previous step)

~32768 ≤ i, i ≤ 32767 ⊦ s2i(i2s(i)) = i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
~32768 ≤ i, i ≤ 32767 ⊦ s2i(i2s(i)) = i

Rule argument

Additional information

Used simplifier rules: ⊦ j ≤ j0 ∧ j0 ≤ j1 → j ≤ j1; (forward)