Proof step e-2a53ff5ba197ee63

basis_map A008277 → concludes about 5-Stirling numbers of the second kind. JSON

Theorem

Ray basis map theorem [MW08, Thm 2] polytool RealRooted rayBasisMap_maps_realRootedIn_iff ?

Operation

Image under a basis map u^k -> P_k

{
  "map": "A008277",
  "operation": "basis_map"
}

Premises

• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j). (sequence)
  uses: Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, 0]

Claims

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

Verification and certificate

• polytool: replayed (the certificate replayed when the step was written)
• Lean: not attempted
• certificate: basis_map, SHA-256 d40654bfb6e1b81f1854b4abdb93628c8a51c7cf25b302c52d58e72794b43ba4, 7,525 bytes (1,494 compressed); download JSON

Cited by

• n-bac12d13055658fe (one_signed_coefficients)
• n-bac12d13055658fe (hadamard_kernel)
• n-bac12d13055658fe (real_rooted)

References

1. [MW08] Shi-Mei Ma and Yi Wang. q-Eulerian polynomials and polynomials with only real zeros. The Electronic Journal of Combinatorics, 15(1):Research Paper 17, January 2008. doi:10.37236/741