exceptional values
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21: 34.4 Definition: Symbol
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►where the summation is taken over all admissible values of the ’s and ’s for each of the four symbols; compare (34.2.2) and (34.2.3).
►Except in degenerate cases the combination of the triangle inequalities for the four symbols in (34.4.1) is equivalent to the existence of a tetrahedron (possibly degenerate) with edges of lengths ; see Figure 34.4.1.
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22: 28.12 Definitions and Basic Properties
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§28.12(i) Eigenvalues
►The introduction to the eigenvalues and the functions of general order proceeds as in §§28.2(i), 28.2(ii), and 28.2(iii), except that we now restrict ; equivalently . … ► … ►As in §28.7 values of for which (28.2.16) has simple roots are called normal values with respect to . … ►If is a normal value of the corresponding equation (28.2.16), then these functions are uniquely determined as analytic functions of and by the normalization …23: 10.2 Definitions
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►Except in the case of , the principal branches of and are two-valued and discontinuous on the cut ; compare §4.2(i).
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►Except where indicated otherwise, it is assumed throughout the DLMF that the symbols , , , and denote the principal values of these functions.
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24: 4.23 Inverse Trigonometric Functions
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►Except where indicated otherwise, it is assumed throughout the DLMF that the inverse trigonometric functions assume their principal values.
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25: 10.25 Definitions
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►Except where indicated otherwise it is assumed throughout the DLMF that the symbols and denote the principal values of these functions.
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26: 10.75 Tables
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Makinouchi (1966) tabulates all values of and in the interval , with at least 29S. These are for , 10, 20; , ; with and , except for .
27: 19.16 Definitions
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►In (19.16.1)–(19.16.2_5),
except that one or more of may be 0 when the corresponding integral converges.
In (19.16.2) the Cauchy principal value is taken when is real and negative.
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28: 19.3 Graphics
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►In Figures 19.3.7 and 19.3.8 for complete Legendre’s elliptic integrals with complex arguments, height corresponds to the absolute value of the function and color to the phase.
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29: 15.6 Integral Representations
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►In all cases the integrands are continuous functions of on the integration paths, except possibly at the endpoints.
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►In (15.6.1) all functions in the integrand assume their principal values.
►In (15.6.2) the point lies outside the integration contour, and assume their principal values where the contour cuts the interval , and at .
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►In (15.6.6) the integration contour separates the poles of and from those of , and has its principal value.
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►In each of (15.6.8) and (15.6.9) all functions in the integrand assume their principal values.
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30: 32.7 Bäcklund Transformations
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►With the exception of , a Bäcklund transformation relates a Painlevé transcendent of one type either to another of the same type but with different values of the parameters, or to another type.
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