Proof step

Affine, reversal and Möbius substitutions (elementary)

Image under a real-rootedness preserver reversal, shift 0

Concludes

reversal of Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,3].

Premises

Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,3].
sequence: Every row P_n, n >= 1, 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-a6fadfbae3cc127d · JSON

Operation

Image under a real-rootedness preserver

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

Claims

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

Certificate

preserver_image, SHA-256 6772c2a28b54e62dec565db8b80ef2542bb9f356bc7de545d743f1d8184e431a, 9,507 bytes (2,610 compressed); download

polytool replayed the certificate when the step was written.

Cited by

n-1658117d1dedf548 (real_rooted)
n-1658117d1dedf548 (one_signed_coefficients)
n-1658117d1dedf548 (hadamard_kernel)