Download e-book for kindle: An Introduction to the Uncertainty Principle: Hardy’s by Sundaram Thangavelu

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By Sundaram Thangavelu

ISBN-10: 0817643303

ISBN-13: 9780817643300

ISBN-10: 1461264685

ISBN-13: 9781461264682

In 1932 Norbert Wiener gave a sequence of lectures on Fourier research on the Univer­ sity of Cambridge. One results of Wiener's stopover at to Cambridge used to be his famous textual content The Fourier quintessential and likely of its purposes; one other was once a paper via G. H. Hardy within the 1933 Journalofthe London Mathematical Society. As Hardy says within the advent to this paper, This notice originates from a comment of Prof. N. Wiener, to the impact that "a f and g [= j] can't either be very small". ... The theo­ pair of transforms rems which stick to provide the main specified interpretation attainable ofWiener's comment. Hardy's personal assertion of his effects, evenly paraphrased, is as follows, during which f is an integrable functionality at the actual line and f is its Fourier rework: x 2 m If f and j are either zero (Ix1e- /2) for big x and a few m, then every one is a finite linear mix ofHermite capabilities. particularly, if f and j are x2 x 2 2 2 either O(e- / ), then f = j = Ae- / , the place A is a continuing; and if one x 2 2 is0(e- / ), then either are null.

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An Introduction to the Uncertainty Principle: Hardy’s Theorem on Lie Groups (Progress in Mathematics) by Sundaram Thangavelu


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