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1: 26.6 Other Lattice Path Numbers
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is the number of lattice paths from to that stay on or above the line and are composed of directed line segments of the form , , or .
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Narayana Number
► is the number of lattice paths from to that stay on or above the line , are composed of directed line segments of the form or , and for which there are exactly occurrences at which a segment of the form is followed by a segment of the form . … ►For sufficiently small and , … ►
26.6.8
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2: 10.75 Tables
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British Association for the Advancement of Science (1937) tabulates , , , 7–8D; , , , 7–10D; , , , , , 8D. Also included are auxiliary functions to facilitate interpolation of the tables of , for small values of .
Bickley et al. (1952) tabulates or , or , , (.01 or .1) 10(.1) 20, 8S; , , , or , 10S.
The main tables in Abramowitz and Stegun (1964, Chapter 9) give , , , , 8D–10D or 10S; , , , ; , , , 8D; , , , , 5S; , , , , 9–10S.
Kerimov and Skorokhodov (1984b) tabulates all zeros of the principal values of and , for , 9S.
3: 11.6 Asymptotic Expansions
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►where is an arbitrary small positive constant.
If the series on the right-hand side of (11.6.1) is truncated after terms, then the remainder term is .
If is real, is positive, and , then is of the same sign and numerically less than the first neglected term.
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…These and higher coefficients can be computed via the representations in Nemes (2015b).
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4: 9.7 Asymptotic Expansions
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►Here denotes an arbitrary small positive constant and
…Also and for ,
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►Numerical values of are given in Table 9.7.1 for to 2D.
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►where .
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►with .
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5: 36.5 Stokes Sets
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►Stokes sets are surfaces (codimension one) in space, across which or acquires an exponentially-small asymptotic contribution (in ), associated with a complex critical point of or .
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. Airy Function
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… ►For , there are two solutions , provided that . …6: 33.5 Limiting Forms for Small , Small , or Large
7: 11.1 Special Notation
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►For the functions , , , , , and see §§10.2(ii), 10.25(ii).
►The functions treated in this chapter are the Struve functions and , the modified Struve functions and , the Lommel functions and , the Anger function , the Weber function , and the associated Anger–Weber function .
real variable. | |
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nonnegative integer. | |
arbitrary small positive constant. |
8: 12.1 Special Notation
9: 8.20 Asymptotic Expansions of
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8.20.2
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again denoting an arbitrary small positive constant.
Where the sectors of validity of (8.20.2) and (8.20.3) overlap the contribution of the first term on the right-hand side of (8.20.3) is exponentially small compared to the other contribution; compare §2.11(ii).
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►For and let and define ,
…so that is a polynomial in of degree when .
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