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Sums of three or more primes. (English) Zbl 1036.11506
Summary: It has long been known that, under the assumption of the Riemann Hypothesis, one can give upper and lower bounds for the error $$\sum_{p \leq x} \log p - x$$ in the Prime Number Theorem, such bounds being within a factor of $$(\log x)^{2}$$ of each other and this fact being equivalent to the Riemann Hypothesis. In this paper the authors show that, provided “Riemann Hypothesis” is replaced by “Generalized Riemann Hypothesis”, results of similar (often greater) precision hold in the case of the corresponding formula for the representation of an integer as the sum of $$k$$ primes for $$k \geq 4$$, and, in a mean square sense, for $$k \geq 3$$. We also sharpen, in most cases to best possible form, the original estimates of Hardy and Littlewood which were based on the assumption of a “Quasi-Riemann Hypothesis”. We incidentally give a slight sharpening to a well-known exponential sum estimate of Vinogradov-Vaughan.

##### MSC:
 11P32 Goldbach-type theorems; other additive questions involving primes 11M26 Nonreal zeros of $$\zeta (s)$$ and $$L(s, \chi)$$; Riemann and other hypotheses
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##### References:
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