Proof step e-4fa62233b528a616

theorem_check three_term_recurrence → concludes about Coefficient table for Chebyshev's U(2*n,x) polynomial expanded in decreasing powers of (-4*(1-x^2)). JSON

Theorem

Three-term recurrence criterion [Sze39, §3.3; Fav35] polytool ?

Operation

Theorem check of the node's own rule

{
  "operation": "theorem_check",
  "theorem": "three_term_recurrence"
}

Premises

None: this step is a direct theorem check.

Claims

• { "claim": "real_rooted", "from_index": 0, "region": { "upper": { "closed": false, "value": "0" } } }
• { "claim": "interlacing", "from_index": 1, "kind": "strict", "orientation": "previous_interlaces_next" }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: theorem_check, SHA-256 89e961b6b893cb5ae0fa7d1e14eaa7758307e6816d91bc34c0066a03ddfd4283, 3,602 bytes (1,256 compressed); download JSON

Cited by

• n-9496336e2b29e28e (real_rooted)
• n-9496336e2b29e28e (one_signed_coefficients)
• n-9496336e2b29e28e (hadamard_kernel)
• n-9496336e2b29e28e (interlacing)

References

1. [Fav35] Jean Favard. Sur les polynômes de tchebicheff. C. R. Acad. Sci. Paris, 200:2052–2053, 1935.
2. [Sze39] G. Szegő. Orthogonal Polynomials. Colloquium publications, American Mathematical Society, 1939. doi:10.1090/coll/023