Proof step

Geometric basis map (elementary)

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

Concludes

Premises

basis_map_A013609 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-a8b44477f3cc9855 · 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 85f01da49707272e007e9c05ae137077d6a6731947338c4db1e84239c744e42e, 6,859 bytes (1,392 compressed); download

polytool replayed the certificate when the step was written.

Cited by