path integral
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11: 5.9 Integral Representations
§5.9 Integral Representations
… ►Hankel’s Loop Integral
… ►where the path is the real axis. … ► … ► …12: 5.13 Integrals
§5.13 Integrals
►In (5.13.1) the integration path is a straight line parallel to the imaginary axis. … ►Barnes’ Beta Integral
… ►Ramanujan’s Beta Integral
… ►13: 2.4 Contour Integrals
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►Let denote the path for the contour integral
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►Paths on which is constant are also the ones on which decreases most rapidly.
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14: 8.6 Integral Representations
§8.6 Integral Representations
… ►§8.6(ii) Contour Integrals
… ► takes its principal value where the path intersects the positive real axis, and is continuous elsewhere on the path. …where the integration path passes above or below the pole at , according as upper or lower signs are taken. … ►In (8.6.10)–(8.6.12), is a real constant and the path of integration is indented (if necessary) so that in the case of (8.6.10) it separates the poles of the gamma function from the pole at , in the case of (8.6.11) it is to the right of all poles, and in the case of (8.6.12) it separates the poles of the gamma function from the poles at . …15: 8.19 Generalized Exponential Integral
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►When the path of integration excludes the origin and does not cross the negative real axis (8.19.2) defines the principal value of , and unless indicated otherwise in the DLMF principal values are assumed.
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►The general function is attained by extending the path in (8.19.2) across the negative real axis.
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16: 3.5 Quadrature
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§3.5(ix) Other Contour Integrals
…17: 9.13 Generalized Airy Functions
18: 19.2 Definitions
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►The integral for is well defined if , and the Cauchy principal value (§1.4(v)) of is taken if vanishes at an interior point of the integration path.
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19: 23.6 Relations to Other Functions
20: 31.9 Orthogonality
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31.9.5
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