Proof step e-bfdacf28446aab8d

basis_map A027467 → concludes about Triangle read by rows, T(n,k) = T(n-1,k) + T(n-2,k) + T(n-1,k-1) + T(n-2,k-1) and T(0,0) = 1. JSON

Theorem

Geometric basis map (elementary) polytool ?

Operation

Image under a basis map u^k -> P_k

{
  "map": "A027467",
  "operation": "basis_map"
}

Premises

• basis-map coefficients of Triangle read by rows, T(n,k) = T(n-1,k) + T(n-2,k) + T(n-1,k-1) + T(n-2,k-1) and T(0,0) = 1. (sequence)
  uses: Every row P_n, n >= 1, is zero or real-rooted with all roots in (-inf, 15]

Claims

• { "claim": "real_rooted", "from_index": 1, "region": { "upper": { "closed": true, "value": "0" } } }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: basis_map, SHA-256 21a6c0d503e49c5f4b3c634ad92579a6532bf96f971e0a02abba5c4d4dc1ce37, 12,089 bytes (2,314 compressed); download JSON

Cited by

• n-c72653d9ab0ee8be (one_signed_coefficients)
• n-c72653d9ab0ee8be (hadamard_kernel)
• n-c72653d9ab0ee8be (real_rooted)