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Proof step 3 from proof pred-03 (previous step)

⊦ 0 -1 = 0 - 1

User applied rule insert lemma

And obtained the following new goals

Proof step 4:
⊦ m - n +1 = (m - n)-1

Rule argument

spec: inst: name: sub-rec seq: ⊦ m - n +1 = (m - n)-1 subst: [m, n] → [0, 0] flags: current, []

Additional information

Used terms: 0, 0