Proof step e-7ce0c29875c331b6

theorem_check liu_wang → concludes about Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 2*x + 2. JSON

Theorem

Liu–Wang theorem [LW07, Thm 2.1, Cor 2.4] ?

Operation

Theorem check of the node's own rule

{
  "operation": "theorem_check",
  "theorem": "liu_wang"
}

Premises

None: this step is a direct theorem check.

Claims

• { "claim": "real_rooted", "from_index": 0, "region": { "upper": { "closed": false, "value": "0" } } }
• { "claim": "interlacing", "from_index": 1, "kind": "weak", "orientation": "previous_interlaces_next" }

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: theorem_check, SHA-256 58fa0f047e0cacbe87fafe8bae231f95de1959f3a41158cc97a49a72a7fe2851, 3,294 bytes (1,128 compressed); download JSON

Cited by

• n-41809911e05bb4ba (real_rooted)
• n-41809911e05bb4ba (one_signed_coefficients)
• n-41809911e05bb4ba (hadamard_kernel)
• n-41809911e05bb4ba (interlacing)

References

1. [LW07] Lily L. Liu and Yi Wang. A unified approach to polynomial sequences with only real zeros. Advances in Applied Mathematics, 38(4):542–560, May 2007. doi:10.1016/j.aam.2006.02.003