Radial Characteristics Functions.
Technical summary rept.,
WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTER
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WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTERRadial Characteristics Functions.Technical summary rept.,SAskey,Richard MRC-TSR-1262DA-31-124-AROD-462Fourier transformation, Measure theory, Bessel functions, TheoremsPolya theorem, Characteristic functionsIn 1918 Polya proved that the Fourier transform of an even function which is convex for x or 0, continuous and vanishes at infinity is nonnegative. In 1949 he pointed out that this transform could be inverted, so that the function is positive definite, and if it is one when x is zero, it is a characteristic function. An extension of this result to n-dimensions is presented. Modified author abstract
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