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A Fourth Derivative Test for Exponential Sums
Published online by Cambridge University Press: 04 December 2007
Abstract
We give an upper bound for the exponential sum [sum ]Mm=1 e2iπf(m) in terms of M and λ, where λ is a small positive number which denotes the size of the fourth derivative of the real valued function f. The classical van der Corput's exponent 1/14 is improved into 1/13 by reducing the problem to a mean square value theorem for triple exponential sums.
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- © 2002 Kluwer Academic Publishers
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