Proof step

Geometric basis map (elementary)

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

Concludes

Premises

basis_map_A007318 of Triangle of coefficients in expansion of (2+3x)^n.
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-d49867c7ea5c18ce · 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"
    }
  }
}

Certificate

basis_map, SHA-256 38c7a5836e7c3abd66f1f5cd807c329d873b73eae3bf6f31450accd69cc47611, 6,855 bytes (1,394 compressed); download

polytool replayed the certificate when the step was written.

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