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Proof step 2 from proof rest-mklist-03 (previous step)

⊦ mklist(a, n) + mklist(a, m) = mklist(a, m) + mklist(a, n), restn(m, mklist(a, n) + mklist(a, m)) = mklist(a, n)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ mklist(a, m + n) = mklist(a, m) + mklist(a, n)
Proof step 4:
⊦ mklist(a, n + m) = mklist(a, m) + mklist(a, n), restn(m, mklist(a, n + m)) = mklist(a, n)

Rule argument

spec: list-last inst: name: mk-plus seq: ⊦ mklist(a, m + n) = mklist(a, m) + mklist(a, n) subst: [n, m, a] → [m, n, a] flags: rewrite

Additional information

Used terms: m, n, a