Proof step

Affine, reversal and Möbius substitutions (elementary)

Image under a real-rootedness preserver reversal, shift 0

Concludes

basis_map_A007318 of Triangle whose (i,j)-th entry is binomial(i,j)*2^i.

Premises

basis_map_A013609 of Infinite lower triangular matrix with 2^k in the right diagonal and the rest zeros. Triangle, T(n,k), n zeros followed…
sequence: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, 0]

Theorem

polytool ?

Lean

RealRooted route reversed RealRooted.X_pow_mul_reverse_eq_zero_or_splits, RealRooted.reflect_eq_zero_or_splits

Checked

polytool replayed · Lean not attempted

Technical details

Step id

e-bbaec10d85f6b38a · JSON

Operation

Image under a real-rootedness preserver

{
  "index_shift": 0,
  "operation": "preserver_image",
  "operator": "{\"shape\":\"reversal\",\"schedule\":{\"first_index\":0,\"first_degree\":0,\"step\":1}}"
}

Claims

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

Certificate

preserver_image, SHA-256 1da5c71e4880b253cbecaded53b071e095985b6c5a7019ae52d75eea9ed44a50, 8,041 bytes (2,379 compressed); download

polytool replayed the certificate when the step was written.

Cited by

n-fff9dc1c6c2891b5 (real_rooted)
n-fff9dc1c6c2891b5 (one_signed_coefficients)
n-fff9dc1c6c2891b5 (hadamard_kernel)