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arXiv 0707.0299math.NT
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等差数列中光滑数的分布

The distribution of smooth numbers in arithmetic progressions

K. Soundararajan

摘要:

对于广泛的$x$和$y$,我们表明,${\Cal S}(x,y)$,一组整数低于$x$只低于$y$的素因子组成,是等距分布在约化剩余类$\pmod q$的所有$q<y^{4\sqrt{e}-ε}$。这改善了早期的工作格兰维尔;任何改善这一范围的$q$将有有趣的后果维诺格拉多夫猜想的最小平方非剩余。对于更大的范围内的$q$,我们证明了存在一个大的子群的减少残基,使${\Cal S}(x,y)$是equidistributed内陪集的子群。

英文摘要:

For a wide range of $x$ and $y$ we show that ${\Cal S}(x,y)$, the set of integers below $x$ composed only of prime factors below $y$, is equidistributed in the reduced residue classes $\pmod q$ for all $q<y^{4\sqrt{e}-ε}$. This improves earlier work of Granville; any improvement of this range of $q$ would have interesting consequences for Vinogradov's conjecture on the least quadratic non-residue. For larger ranges of $q$ we prove the existence of a large subgroup of the group of reduced residues such that ${\Cal S}(x,y)$ is equidistributed within cosets of that subgroup.

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