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On Salié's sum

Published online by Cambridge University Press:  18 May 2009

L. J. Mordell
Affiliation:
St. John's College, Cambridge
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Let p be an odd prime and let f(x) be a complex-valued function such that f(x+p) = f(x) for all integers x. Write e(x) = exp(2πix/p), and define l/x by , where We consider the sum

where is the Legendre symbol. The sum is zero if as is clear on replacing x by bjax. Salié has found a result which can be written in the form

when h2 ≡ 4ab(modp).

Information

Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 1973