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Proof step 7 from proof swap-to-from-app (previous step)

⊦ (σ to n0 + m) + σ0 from m = ((σ to m + n0) from m) + σ0, # σ < ⌜n0⌝ + ⌜m⌝ , # σ < ⌜m⌝ + ⌜n0⌝

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information