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definition
def or abbrev
IsPolynomial
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31def IsPolynomial (f : ℕ → ℕ) : Prop := ∃ c k : ℕ, ∀ n, f n ≤ c * n ^ k + c
proof body
Definition body.
32
33/-- RS‑preserving reduction scaffold: relates complexities up to monotone envelopes. -/