continuous function
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11: 1.5 Calculus of Two or More Variables
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§1.5(i) Partial Derivatives
►A function is continuous at a point if … ►A function is continuous on a point set if it is continuous at all points of . A function is piecewise continuous on , where and are intervals, if it is piecewise continuous in for each and piecewise continuous in for each . …12: 2.1 Definitions and Elementary Properties
13: 3.11 Approximation Techniques
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►Furthermore, if , then the convergence of (3.11.11) is usually very rapid; compare (1.8.7) with arbitrary.
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►Let be continuous on a closed interval and be a continuous nonvanishing function on : is called a weight function.
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14: 1.9 Calculus of a Complex Variable
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Continuity
►A function is continuous at a point if . … ►A function is continuous on a region if for each point in and any given number () we can find a neighborhood of such that for all points in the intersection of the neighborhood with . … ►Let be a finite or infinite interval, and be real or complex continuous functions, . …15: 1.6 Vectors and Vector-Valued Functions
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►The path integral of a continuous function
is
…If and , then the reparametrization is called orientation-preserving, and
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►The integral of a continuous function
over a surface is
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16: 1.10 Functions of a Complex Variable
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►Assume that for each , is an analytic function of in , and also that is a continuous function of both variables.
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►For each , is analytic in ; is a continuous function of both variables when and ; the integral (1.10.18) converges at , and this convergence is uniform with respect to in every compact subset of .
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17: 28.31 Equations of Whittaker–Hill and Ince
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►ambiguities in sign being resolved by requiring and to be continuous functions of and positive when .
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18: 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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19: 31.9 Orthogonality
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►The branches of the many-valued functions are continuous on the path, and assume their principal values at the beginning.
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20: 28.30 Expansions in Series of Eigenfunctions
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►Then every continuous
-periodic function
whose second derivative is square-integrable over the interval can be expanded in a uniformly and absolutely convergent series
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