recursion formulas
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11—14 of 14 matching pages
11: 12.14 The Function
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§12.14(iv) Connection Formula
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12.14.9
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12.14.10
►where and satisfy the recursion relations
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12: 18.30 Associated OP’s
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►The recursion relation for the associated Laguerre polynomials, see (18.30.2), (18.30.3) is
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►The recursion relation for the associated Hermite polynomials, see (18.30.2), and (18.30.3), is
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►Defining associated orthogonal polynomials and their relationship to their corecursive counterparts is particularly simple via use of the recursion relations for the monic, rather than via those for the traditional polynomials.
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►In the monic case, the monic associated polynomials
of order with respect to the are obtained by simply changing the initialization and recursions, respectively, of (18.30.2) and (18.30.3) to
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►followed by use of the
recursion of (18.30.27).
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13: 29.6 Fourier Series
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►This solution can be constructed from (29.6.4) by backward recursion, starting with and an arbitrary nonzero value of , followed by normalization via (29.6.5) and (29.6.6).
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14: 18.39 Applications in the Physical Sciences
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►The discrete variable representations (DVR) analysis is simplest when based on the classical OP’s with their analytically known recursion coefficients (Table 3.5.17_5), or those non-classical OP’s which have analytically known recursion coefficients, making stable computation of the and , from the J-matrix as in §3.5(vi), straightforward.
…Table 18.39.1 lists typical non-classical weight functions, many related to the non-classical Freud weights of §18.32, and §32.15, all of which require numerical computation of the recursion coefficients (i.
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►Following the method of Schwartz (1961), Yamani and Reinhardt (1975), Bank and Ismail (1985), and Ismail (2009, §5.8) have shown this is equivalent to determination of such that in the recursion scheme
…The recursion of (18.39.46) is that for the type 2 Pollaczek polynomials of (18.35.2), with , , and , and terminates for being a zero of the polynomial of order .
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►As this follows from the three term recursion of (18.39.46) it is referred to as the J-Matrix approach, see (3.5.31), to single and multi-channel scattering numerics.
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