Proof step

Affine, reversal and Möbius substitutions (elementary)

Image under a real-rootedness preserver reversal, shift 0

Concludes

reversal of Triangle of coefficients of Chebyshev's S(n,x+4) polynomials (exponents of x in increasing order).

Premises

Triangle of coefficients of Chebyshev's S(n,x+4) polynomials (exponents of x in increasing order).
sequence: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-6, -2)

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-b768fdcb322c6ad3 · 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": {
    "lower": {
      "closed": false,
      "value": "-1/2"
    },
    "upper": {
      "closed": true,
      "value": "0"
    }
  }
}

Certificate

preserver_image, SHA-256 d310a4c9b4ced570f17c4e3c3c16bb00b69dc63b3f70163349ef892c4187e3e0, 17,220 bytes (3,370 compressed); download

polytool replayed the certificate when the step was written.

Cited by

n-8ac1223942f7b8c5 (real_rooted)
n-8ac1223942f7b8c5 (one_signed_coefficients)
n-8ac1223942f7b8c5 (hadamard_kernel)