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Proof step 9 from proof add-assoc (previous step)

⊦ (⌜m0⌝ + n∞1) + ⌜m⌝ = ⌜m0⌝ + n∞1 + ⌜m⌝

User applied rule structural induction

And obtained the following new goals

Proof step 10:
⊦ (⌜m0⌝ + ⌜m1⌝ ) + ⌜m⌝ = ⌜m0⌝ + ⌜m1⌝ + ⌜m⌝

Rule argument

indvar: n∞1

Additional information

Used simplifier rules: gen: ⊦ ;%add-inf2: ⊦ ⌜m⌝ + ∞ = ∞;%add-inf1: ⊦ ∞ + ⌜m⌝ = ∞;