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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 on a point set if it is continuous at all points of . … … ►Sufficient conditions for the limit to exist are that is continuous, or piecewise continuous, on . … ►If is continuous, and is the set …12: 18.21 Hahn Class: Interrelations
13: 18.20 Hahn Class: Explicit Representations
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Continuous Hahn
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18.20.3
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18.20.9
►(For symmetry properties of with respect to , , , see Andrews et al. (1999, Corollary 3.3.4).)
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14: 1.17 Integral and Series Representations of the Dirac Delta
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►From the mathematical standpoint the left-hand side of (1.17.2) can be interpreted as a generalized integral in the sense that
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►for all functions that are continuous when , and for each , converges absolutely for all sufficiently large values of .
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►More generally, assume is piecewise continuous (§1.4(ii)) when for any finite positive real value of , and for each , converges absolutely for all sufficiently large values of .
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►provided that is continuous when , and for each , converges absolutely for all sufficiently large values of (as in the case of (1.17.6)).
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►provided that is continuous and of period ; see §1.8(ii).
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15: 18.22 Hahn Class: Recurrence Relations and Differences
16: 6.16 Mathematical Applications
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►It occurs with Fourier-series expansions of all piecewise continuous functions.
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17: 18.23 Hahn Class: Generating Functions
18: 28.9 Zeros
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►They are continuous in .
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19: 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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20: 1.8 Fourier Series
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►If is of period , and is piecewise continuous, then
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►If and are continuous, have the same period and same Fourier coefficients, then for all .
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►For piecewise continuous on and real ,
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►Let be an absolutely integrable function of period , and continuous except at a finite number of points in any bounded interval.
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►Suppose that is continuous and of bounded variation on .
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