Proof step e-3dedd873ceec398a

preserver_image mobius, shift 0 → concludes about mobius_x_over_x_plus_one of Riordan array (1/((1-x)(1-3x)),x/((1-x)(1-3x))). JSON

Theorem

Affine, reversal and Möbius substitutions (elementary) polytool ?

Lean (RealRooted): route fTransform RealRooted.splits_fPolynomial

Operation

Image under a real-rootedness preserver

{
  "index_shift": 0,
  "operation": "preserver_image",
  "operator": "{\"shape\":\"mobius\",\"a\":\"1\",\"b\":\"0\",\"c\":\"1\",\"e\":\"1\",\"schedule\":{\"first_index\":0,\"first_degree\":0,\"step\":1}}"
}

Premises

• Riordan array (1/((1-x)(1-3x)),x/((1-x)(1-3x))). (sequence)
  uses: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-8, 0)

Claims

• { "claim": "real_rooted", "from_index": 0, "region": { "lower": { "closed": true, "value": "-1" }, "upper": { "closed": false, "value": "0" } } }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: preserver_image, SHA-256 be97f12002ddc5ef291896cd6655868a83b6fdbd38dd43ae2244795530609b47, 17,263 bytes (3,314 compressed); download JSON

Cited by

• n-39b6e7fd4a9cc7c7 (real_rooted)
• n-39b6e7fd4a9cc7c7 (one_signed_coefficients)
• n-39b6e7fd4a9cc7c7 (hadamard_kernel)