Proof step e-1cab7244184e4365

basis_map A013609 → concludes about basis_map_A013609 of Triangle read by rows: T(n,0) = 0 for n >= 0; T(n,2*k+1) = A152842(2*n,2*(n-k)) and T(n,2*k) = A152842(2*n,2*(n-k)+1) for n >= k > 0. JSON

Theorem

Geometric basis map (elementary) polytool ?

Operation

Image under a basis map u^k -> P_k

{
  "map": "A013609",
  "operation": "basis_map"
}

Premises

• Triangle read by rows: T(n,0) = 0 for n >= 0; T(n,2*k+1) = A152842(2*n,2*(n-k)) and T(n,2*k) = A152842(2*n,2*(n-k)+1) for n >= k > 0. (sequence)
  uses: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, 0]

Claims

• { "claim": "real_rooted", "from_index": 0, "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 a16073e0bc759f246ae86ba5001cde60875528da151ab20464907c01140a8056, 6,897 bytes (1,407 compressed); download JSON

Cited by

• n-bae5a2c240bb2e7e (real_rooted)
• n-bae5a2c240bb2e7e (one_signed_coefficients)
• n-bae5a2c240bb2e7e (hadamard_kernel)