Cauchy sum
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1: 17.5 Functions
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Cauchy’s Sum
…2: 1.7 Inequalities
3: 2.10 Sums and Sequences
§2.10 Sums and Sequences
… ►For an extension to integrals with Cauchy principal values see Elliott (1998). … ►and Cauchy’s theorem, we have … ►These problems can be brought within the scope of §2.4 by means of Cauchy’s integral formula … ►By allowing the contour in Cauchy’s formula to expand, we find that …4: 4.10 Integrals
5: 18.40 Methods of Computation
6: 1.4 Calculus of One Variable
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►where the sum is over all nonnegative integers that satisfy , and .
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►Definite integrals over the Stieltjes measure could represent a sum, an integral, or a combination of the two.
Let , , .
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Cauchy Principal Values
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1.4.24
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7: 18.17 Integrals
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►provided that is even and the sum of any two of is not less than the third; otherwise the integral is zero.
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18.17.42
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18.17.43
►These integrals are Cauchy principal values (§1.4(v)).
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►provided that is even and the sum of any two of is not less than the third; otherwise the integral is zero.
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8: 19.8 Quadratic Transformations
9: 1.18 Linear Second Order Differential Operators and Eigenfunction Expansions
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►An inner product space is called a Hilbert space if every Cauchy sequence in (i.
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►where the infinite sum means convergence in norm,
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►The sum of the kinetic and potential energies give the quantum Hamiltonian, or energy operator; often also referred to as a Schrödinger operator.
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►Should an eigenvalue correspond to more than a single linearly independent eigenfunction, namely a multiplicity greater than one, all such eigenfunctions will always be implied as being part of any sums or integrals over the spectrum.
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►Spectral expansions of , and of functions of , these being expansions of and in terms of the eigenvalues and eigenfunctions summed over the spectrum, then follow:
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10: 2.3 Integrals of a Real Variable
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►is finite and bounded for , then the th error term (that is, the difference between the integral and th partial sum in (2.3.2)) is bounded in absolute value by when exceeds both and .
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(b)
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►But if (d) applies, then the second sum is absent.
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2.3.4
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As
2.3.14
and the expansion for is differentiable. Again and are positive constants. Also (consistent with (a)).
2.3.31
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