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A136163
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Integration of A053120: triangle of coefficients of integration of Chebyshev's T(n,x) polynomials (powers of x in increasing order).
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0
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1, -1, -1, -1, -3, 0, 2, 4, 0, -12, 0, 8, -1, 15, 0, -40, 0, 24, -4, 0, 60, 0, -120, 0, 64, -1, -35, 0, 210, 0, -336, 0, 160, 8, 0, -168, 0, 672, 0, -896, 0, 384, -1, 63, 0, -672, 0, 2016, 0, -2304, 0, 896, -8, 0, 360, 0, -2400, 0, 5760, 0, -5760, 0, 2048, -1, -99, 0, 1650, 0, -7920, 0, 15840, 0, -14080, 0, 4608
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OFFSET
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1,5
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COMMENTS
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The row sums are:
{-2, 0, -2, 0, -2, 0, -2, 0, -2, 0, -2}
These polynomials are orthogonal:
Table[Table[Integrate[Sqrt[1/(1 - x^2)]*a0[[ n]]*a0[[m]], {x, -1, 1}], {n, 1, 11}], {m, 1, 11}]
Solving for the recurrence:
Table[{c, d} /. Solve[{a0[[n]] -c*x*a0[[n - 1]] + d*a0[[n - 2]] == 0, a0[[n + 1]] - c*x*a0[[n]] + d*a0[[n - 1]] == 0}, {c, d}], {n, 3, 8}];
gives:
Q(x,n)=2*x*Q(x,n-1)-Q(x,n-2)
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REFERENCES
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 795.
Harry Hochstadt, The Functions of Mathematical Physics, Dover, New York, 1986, page 8 and pages 42 - 43;
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LINKS
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FORMULA
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T(x,n)=2*x*T(x,n-1)-T(x,n-2); Q(x,n)=Integrate[T(y,n-1),{y,-1,x}]
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EXAMPLE
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{1},
{-1, -1},
{},
{-1, -3, 0, 2},
{4,0, -12, 0, 8},
{-1, 15, 0, -40, 0, 24},
{-4, 0, 60, 0, -120, 0, 64},
{-1, -35, 0, 210, 0, -336, 0, 160},
{8, 0, -168, 0,672, 0, -896, 0, 384},
{-1, 63, 0, -672, 0, 2016, 0, -2304, 0, 896}.
{-8, 0, 360, 0, -2400, 0, 5760, 0, -5760, 0, 2048},
{-1, -99, 0, 1650, 0, -7920, 0, 15840, 0, -14080, 0, 4608}
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MATHEMATICA
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P[x, 0] = 1; P[x, 1] = x; P[x_, n_] := P[x, n] = 2*x*P[x, n - 1] - P[x, n - 2]; a0 = Table[ExpandAll[P[x, n]] /. x -> y, {n, 0, 10}]; b0 = Table[n*(n - 2)*Integrate[a0[[n]], {y, -1, x}], {n, 1, 11}] a = Join[{{1}}, Table[CoefficientList[b0[[n]], x], {n, 1, 11}]] Table[Apply[Plus, CoefficientList[b0[[n]], x]], {n, 1, 11}] Flatten[a]
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CROSSREFS
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KEYWORD
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uned,tabf,sign
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AUTHOR
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STATUS
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approved
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