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Proof step 8 from proof blastN-mklist (previous step)

∀ x0, a0. butlastn(m, (x0 + mklist(a0, m + 1)).butlast) = x0 ⊦ butlastn(m, x + (a ' + mklist(a, m)).butlast) = x

User applied rule all left

And obtained the following new goals

Proof step 9:
butlastn(m, (x + mklist(a, m + 1)).butlast) = x, ∀ x0, a0. butlastn(m, (x0 + mklist(a0, m + 1)).butlast) = x0 ⊦ butlastn(m, x + (a ' + mklist(a, m)).butlast) = x

Rule argument

pos: left 1 terms: x, a abort: F discard: F computed: T

Additional information

Used terms: x, a