Proof step

Geometric basis map (elementary)

Image under a basis map u^k -> P_k A013609

Concludes

basis_map_A013609 of Exponential Riordan array [x*exp(x),x].

Premises

Exponential Riordan array [x*exp(x),x].
sequence: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, 0]

Theorem

polytool ?

Checked

polytool replayed · Lean not attempted

Technical details

Step id

e-8092054ee8bd26cd · JSON

Operation

Image under a basis map u^k -> P_k

{
  "map": "A013609",
  "operation": "basis_map"
}

Claims

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

{
  "claim": "interlacing",
  "from_index": 2,
  "kind": "weak",
  "orientation": "unordered"
}

Certificate

basis_map, SHA-256 c71cda24a3f6cf0d00fe4ad593ef797ddec765d6d4181d4af17bc1cd84f79e77, 16,296 bytes (3,317 compressed); download

polytool replayed the certificate when the step was written.

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