differentiable
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11: 3.5 Quadrature
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βΊwhere , , and .
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βΊIf in addition is periodic, , and the integral is taken over a period, then
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βΊLet and .
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βΊIf , then the remainder in (3.5.2) can be expanded in the form
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βΊFor functions Gauss quadrature can be very efficient.
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12: 1.16 Distributions
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βΊA test function is an infinitely differentiable function of compact support.
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βΊMore generally, if is an infinitely differentiable function, then
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βΊSuppose is infinitely differentiable except at , where left and right derivatives of all orders exist, and
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βΊLet be the set of all infinitely differentiable functions in variables, , with compact support in .
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βΊFor tempered distributions the space of test functions is the set of all infinitely-differentiable functions of variables that satisfy
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13: 2.4 Contour Integrals
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βΊOn the interval let be differentiable and be absolutely integrable, where is a real constant.
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βΊAssume also (2.4.4) is differentiable.
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14: 10.20 Uniform Asymptotic Expansions for Large Order
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βΊthat is infinitely differentiable on the interval , including .
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βΊEach of the coefficients , , , and , , is real and infinitely differentiable on the interval .
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15: Bibliography W
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Infinitely differentiable generalized logarithmic and exponential functions.
Math. Comp. 57 (196), pp. 723–733.
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16: 9.11 Products
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βΊFor any continuously-differentiable function
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17: 18.40 Methods of Computation
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βΊIn what follows we consider only the simple, illustrative, case that is continuously differentiable so that , with real, positive, and continuous on a real interval The strategy will be to: 1) use the moments to determine the recursion coefficients of equations (18.2.11_5) and (18.2.11_8); then, 2) to construct the quadrature abscissas and weights (or Christoffel numbers) from the J-matrix of §3.5(vi), equations (3.5.31) and(3.5.32).
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18: 30.14 Wave Equation in Oblate Spheroidal Coordinates
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βΊIf , then the function (30.13.8) is a twice-continuously differentiable solution of (30.13.7) in the entire -space.
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19: 2.7 Differential Equations
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βΊIn a finite or infinite interval let be real, positive, and twice-continuously differentiable, and be continuous.
…has twice-continuously differentiable solutions
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