Recurrence 5 lookup certificate: A3 source bound

This is a checked coefficient-lookup shard for the fifth pseudo-division recurrence in the order-seven certificate.

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence5A3_coeff_high (n : ℕ) (h : 164 < n) : Polynomial.coeff remainder5Coefficient3 n = 0

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence5A3_natDegree_le : Polynomial.natDegree remainder5Coefficient3 ≤ 164