Proof step e-1b44abb141022866

basis_map A007318 → concludes about basis_map_A007318 of Riordan array (1/(1-2*x), x*(1+x)/(1-2*x)). JSON

Theorem

Geometric basis map (elementary) polytool ?

Operation

Image under a basis map u^k -> P_k

{
  "map": "A007318",
  "operation": "basis_map"
}

Premises

• Riordan array (1/(1-2*x), x*(1+x)/(1-2*x)). (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" } } }
• { "claim": "interlacing", "from_index": 1, "kind": "weak", "orientation": "unordered" }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: basis_map, SHA-256 079d828f093d3146e97b9e670231cc4fcbf30b451404c1cfe3aee9a12f662a6d, 14,052 bytes (2,692 compressed); download JSON

Cited by

• n-b9dfb234567937e9 (real_rooted)
• n-b9dfb234567937e9 (one_signed_coefficients)
• n-b9dfb234567937e9 (hadamard_kernel)
• n-b9dfb234567937e9 (interlacing)