Proof step e-fc862e6fd76dbdc8

preserver_image mobius, shift 0 → concludes about mobius_x_over_x_plus_one of Exponential Riordan array (1, x(1+x/2)). 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

• Exponential Riordan array (1, x(1+x/2)). (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": { "lower": { "closed": true, "value": "-1" }, "upper": { "closed": true, "value": "0" } } }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: preserver_image, SHA-256 a93010778ac2f30a6c58ae11569e883106feb02efdac692a8436b0518c3e61c3, 9,112 bytes (2,484 compressed); download JSON

Cited by

• n-e92431a37829c185 (real_rooted)
• n-e92431a37829c185 (one_signed_coefficients)
• n-e92431a37829c185 (hadamard_kernel)