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A theorem on multiple integrals

Published online by Cambridge University Press:  24 October 2008

J. M. Hammersley
Affiliation:
Lectureship in the design and analysis of scientific experimentUniversity of Oxford

Extract

Suppose that dυ and dυ′ are two volume elements situated at points P and P′ respectively in a three-dimensional right circular cylinder, that y is the distance PP′, that z(y) is a given function of y, and that we wish to evaluate the sixfold integral

taken over all pairs of points P, P′ within the cylinder. We observe that z(y) is a function of y only; so that the sixfold integral can be expressed as a single integral

that is to say a weighted mean of z(y) over the relevant values of y, where the weight function is evidently given by

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1951

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References

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