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Proof step 1 from proof fill-lastn-01 (conclusion)

⊦ n ≤ # bits → lastn(n, fillsgn(n, bits)) = lastn(n, bits)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: fillsgn-longer: ⊦ n ≤ # bits → fillsgn(n, bits) = bits;