expansions in Mathieu functions
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21: 28.4 Fourier Series
§28.4 Fourier Series
… ►The Fourier series of the periodic Mathieu functions converge absolutely and uniformly on all compact sets in the -plane. … ►§28.4(ii) Recurrence Relations
… ►§28.4(iii) Normalization
… ►§28.4(v) Change of Sign of
…22: 28.30 Expansions in Series of Eigenfunctions
§28.30 Expansions in Series of Eigenfunctions
… ►Let , , be the set of characteristic values (28.29.16) and (28.29.17), arranged in their natural order (see (28.29.18)), and let , , be the eigenfunctions, that is, an orthonormal set of -periodic solutions; thus ►23: 28.6 Expansions for Small
§28.6(i) Eigenvalues
… ►The coefficients of the power series of , and also , are the same until the terms in and , respectively. … ►Higher coefficients in the foregoing series can be found by equating coefficients in the following continued-fraction equations: … ►§28.6(ii) Functions and
… ►For the corresponding expansions of for change to everywhere in (28.6.26). …24: Bibliography F
25: Bibliography M
26: 1.18 Linear Second Order Differential Operators and Eigenfunction Expansions
27: Errata
§4.13 has been enlarged. The Lambert -function is multi-valued and we use the notation , , for the branches. The original two solutions are identified via and .
Other changes are the introduction of the Wright -function and tree -function in (4.13.1_2) and (4.13.1_3), simplification formulas (4.13.3_1) and (4.13.3_2), explicit representation (4.13.4_1) for , additional Maclaurin series (4.13.5_1) and (4.13.5_2), an explicit expansion about the branch point at in (4.13.9_1), extending the number of terms in asymptotic expansions (4.13.10) and (4.13.11), and including several integrals and integral representations for Lambert -functions in the end of the section.
The symbol is used for two purposes in the DLMF, in some cases for asymptotic equality and in other cases for asymptotic expansion, but links to the appropriate definitions were not provided. In this release changes have been made to provide these links.
A short paragraph dealing with asymptotic approximations that are expressed in terms of two or more Poincaré asymptotic expansions has been added below (2.1.16).
Originally was expressed in term of asymptotic symbol . As a consequence of the use of the order symbol on the right-hand side, was replaced by .