basis-map coefficients of A113214, shifted → D → basis A013610

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Triangle begins:
  0:     0;
  1:    -1;
  2:     4,      6;
  3:   -12,    -36,     -27;
  4:    32,    144,     216,     108;
  5:   -80,   -480,   -1080,   -1080,    -405;
  6:   192,   1440,    4320,    6480,    4860,    1458;
  7:  -448,  -4032,  -15120,  -30240,  -34020,  -20412,   -5103;
  8:  1024,  10752,   48384,  120960,  181440,  163296,   81648,   17496;
  9: -2304, -27648, -145152, -435456, -816480, -979776, -734832, -314928, -59049;

The row polynomials satisfy (n-1)*P(n,x) = -(2*n+3*n*x)*P(n-1,x) for n >= 2, with P(0,x) = 0, P(1,x) = -1.

P[0, x_] := 0;
P[1, x_] := -1;
P[n_, x_] := P[n, x] = Expand[Together[(-(2*n + 3*n*x)*P[n - 1, x])/(n - 1)]];
Table[CoefficientList[P[n, x], x], {n, 0, 9}] // Flatten

P(N) = {my(v = vector(N + 1)); v[1] = 0; v[2] = -1; for(n = 2, N, my(i = n + 1); v[i] = (-(2*n + 3*n*x)*v[i - 1])/(n - 1)); v};
row(n, p) = {my(c = Vecrev(p)); c};
T(N) = {my(v = P(N)); concat(vector(#v, i, row(i - 1, v[i])))};
T(9)

Properties

• Real-rooted? Every row P_n, n ≥ 0, is zero or real-rooted with all roots in (−∞, 0]
  by Geometric basis map (elementary)
• Coefficients of one sign? Every nonzero row, n ≥ 0: the coefficients of P_n have one sign
  derived from Geometric basis map (elementary)
• Hadamard kernel (Malo)? Rows P_n, n ≥ 0, are Hadamard kernels (preserve real-rootedness)
  derived from Geometric basis map (elementary)
• Interlacing of consecutive rows? Rows P_(m-1), P_m interlace (weak, unordered) for every m ≥ 2
  by Geometric basis map (elementary)

Proof chains ? JSON

• Geometric basis map (elementary) polytool ? step ›

  • from derivative of basis-map coefficients of Riordan array (1+2x,x(1+x)). shifted by x -> -x + 0?
    • Laguerre’s theorem on differential operators [SP14] polytool ? step ›

      • from basis-map coefficients of Riordan array (1+2x,x(1+x)). shifted by x -> -x + 0?
        • Affine, reversal and Möbius substitutions (elementary) polytool ? step ›

          • from basis-map coefficients of Riordan array (1+2x,x(1+x)). shifted by x -> -x + 0?
            • Geometric basis map (elementary) polytool ? step ›

              • from basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
                • Parent-row provers of polytool polytool ? step › direct check
                • Iterated real-rootedness preservers [SP14; Bra15, Thm 7.1 of arXiv:1410.6601; Bra06, Cor 3.5] polytool ? step › direct check
                • Affine, reversal and Möbius substitutions (elementary) polytool ? step ›

                  • from basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
                    • ↑ Parent-row provers of polytool (above)
                    • ↑ Iterated real-rootedness preservers (above)
            • Parent-row provers of polytool polytool ? step › direct check
            • Affine, reversal and Möbius substitutions (elementary) polytool ? step ›

              • from basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
                • ↑ Parent-row provers of polytool (above)
                • ↑ Iterated real-rootedness preservers (above)
                • ↑ Affine, reversal and Möbius substitutions (elementary) (above)
        • ↑ Geometric basis map (elementary) (above)
        • ↑ Parent-row provers of polytool (above)
        • ↑ Affine, reversal and Möbius substitutions (elementary) (above)
    • Geometric basis map (elementary) polytool ? step ›

      • from derivative of basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
        • Laguerre’s theorem on differential operators [SP14] polytool ? step ›

          • from basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
            • ↑ Parent-row provers of polytool (above)
            • ↑ Iterated real-rootedness preservers (above)
            • ↑ Affine, reversal and Möbius substitutions (elementary) (above)
    • Affine, reversal and Möbius substitutions (elementary) polytool ? step ›

      • from derivative of basis-map coefficients of Triangle read by rows: T(n,k) = binomial(k,n-k). shifted by x -> -x + 0?
        • ↑ Laguerre’s theorem on differential operators (above)

Related ?

Same fingerprint ?

• basis-map coefficients of A030528, shifted → basis A013609 → x ↦ x+1
• A085880 → basis A013611 → x ↦ x+1
• A013610 → D → basis A013609
• A178822 → basis A013609 → basis A013610
• A038243 → basis A013611
• A085881 → basis A007318 → basis A013609
• A120910 → x ↦ x/(x+1)
• A085880 → basis A013610 → D
• A132200 → basis A013610
• basis-map coefficients of A026729, shifted → basis A013609 → basis A007318
• A134059 → basis A013610
• A356546 → x ↦ x+1 → basis A013609
• A178822 → basis A013610
• basis-map coefficients of A113214, shifted → basis A013610
• A027465 → basis A013611 → basis A013610
• A038208 → basis A013610 → D
• A038338 → basis A013610
• A038338 → basis A013609 → basis A013610
• A178820 → basis A013610 → D
• A038330 → basis A013609 → x ↦ x/(x+1)
• A156992 → basis A013609 → basis A013610
• A120910 → basis A013609 → reverse
• A178821 → basis A013610 → D
• A156992 → basis A013611 → x ↦ x+1
• A124860 → basis A013610
• A376827 → basis A013610
• basis-map coefficients of A026729 → basis A007318 → basis A013610
• A003506 → x ↦ x+1 → basis A013609
• A085880 → D → basis A013610
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*8^j.
• A094305 → x ↦ x+1 → x ↦ x/(x+1)
• A038221 → basis A013609 → basis A013610
• A156992 → basis A013610 → D
• A196347 → basis A013610 → D
• A038338 → basis A013610 → D
• A038208 → D → basis A013610
• A038221 → basis A013611 → x ↦ x+1
• A038220: Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*2^j.
• A013620: Triangle of coefficients in expansion of (2+3x)^n.
• A038325 → basis A007318 → basis A013609
• A356546 → basis A013610
• A120910 → basis A013609 → D
• A013610 → basis A013611 → basis A013609
• A038330 → basis A013611 → basis A013610
• A085881 → basis A013610
• basis-map coefficients of A127647 → basis A013610
• A038220 → D
• A028326 → basis A013610 → D
• A135838 → basis A013610
• A038325 → basis A013610
• A178820 → basis A013611 → basis A007318
• A038208 → basis A013610
• A003506 → D → basis A013610
• A028326 → basis A013609 → basis A013610
• A134058 → basis A013610
• A178822 → basis A013610 → D
• A013620 → D
• A085880 → basis A013610
• A094305 → basis A013610
• A178821 → basis A013611 → basis A007318
• A038328 → basis A013609 → basis A013610
• A178820 → basis A013609 → basis A013610
• A038334 → reverse
• A356546 → basis A013609 → basis A013610
• A028326 → basis A013611 → x ↦ x+1
• basis-map coefficients of A026729 → basis A013609 → x ↦ x+1
• A028326 → D → basis A013610
• A120910 → basis A013610 → basis A013610
• A178822 → x ↦ x+1 → basis A013609
• A136572 → basis A013609 → x ↦ x+1
• A135089 → basis A013610
• A135065 → x ↦ x+1 → x ↦ x/(x+1)
• A038291 → basis A013609 → basis A013611
• A135065 → basis A013610
• A196347 → basis A013610
• A038330 → basis A013609 → basis A013609
• A038338 → basis A013610 → reverse
• A178821 → basis A013610 → reverse
• basis-map coefficients of A030528, shifted → basis A013610 → basis A013609
• A178820 → basis A013610
• A120910 → basis A013609
• A131431 → x ↦ x+1 → basis A013610
• A216973 → basis A013610
• A136572 → basis A013610 → basis A013609
• A258758 → basis A013610
• A135065 → x ↦ x+1 → basis A013609
• A085880 → basis A013609 → basis A013610
• A028326 → basis A013610
• basis-map coefficients of A112227 → basis A013610 → basis A013609
• A038221 → basis A013610
• A178821 → basis A013610
• basis-map coefficients of A026729, shifted → basis A007318 → basis A013610
• A120909 → basis A013610 → x ↦ x+1
• A156992 → basis A013610
• A196347 → basis A013611 → x ↦ x+1
• A085881 → basis A013609 → basis A013610
• A013609 → basis A013610 → x ↦ x+1
• A156992 → basis A007318 → basis A013609
• A344565 → basis A013610
• A085880 → basis A013610 → reverse
• basis-map coefficients of A112227 → basis A013609 → x ↦ x+1
• A027466 → basis A013611 → x ↦ x/(x+1)
• basis-map coefficients of A026729 → basis A013610 → basis A013609
• A178822 → basis A013611 → basis A007318
• A085881 → basis A013611 → basis A007318
• A038325 → basis A013609 → basis A013610
• A094305 → x ↦ x+1 → basis A013609
• A038243 → basis A013611 → D
• basis-map coefficients of A112227 → x ↦ x+1 → basis A013610
• A028326 → basis A007318 → basis A013609
• A038221 → basis A013610 → D
• A038334 → D
• A356546 → basis A013611 → basis A007318
• A134346 → basis A013610
• A178820 → basis A007318 → basis A013609
• A120910 → D → basis A013609
• A178821 → basis A013609 → basis A013610
• basis-map coefficients of A026729, shifted → basis A013610 → basis A013609

References

1. [Bra06] Petter Brändén. On linear transformations preserving the Pólya frequency property. Transactions of the American Mathematical Society, 358(8):3697–3716, February 2006. doi:10.1090/s0002-9947-06-03856-6
2. [Bra15] Petter Brändén. Unimodality, log-concavity, real-rootedness and beyond. Handbook of enumerative combinatorics, :437–483, March 2015. doi:10.1201/b18255-10
3. [SP14] J Schur and G Polya. Über zwei Arten von Faktorenfolgen in der Theorie der algebraischen Gleichungen. J. Reine Angew. Math., 1914.