Proof step

Geometric basis map (elementary)

Image under a basis map u^k -> P_k A027467

Concludes

Riordan array (1+2x,x(1+x)).

Premises

basis-map coefficients of Riordan array (1+2x,x(1+x)).
sequence: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, 15]

Theorem

polytool ?

Checked

polytool replayed · Lean not attempted

Technical details

Step id

e-9d50a926c8b79db7 · JSON

Operation

Image under a basis map u^k -> P_k

{
  "map": "A027467",
  "operation": "basis_map"
}

Claims

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

{
  "claim": "interlacing",
  "from_index": 1,
  "kind": "weak",
  "orientation": "unordered"
}

Certificate

basis_map, SHA-256 5646c7d892f4ca1e3a24dc82f4c693fcbefc3c014c25d758fa2c15605d4ea1d0, 14,372 bytes (2,760 compressed); download

polytool replayed the certificate when the step was written.

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