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arXiv 0806.4330math.NTmath.AG
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三个k次幂的和与差

Sums and Differences of Three k-th Powers

D. R. Heath-Brown

摘要:

设k>2是一个固定的整数指数,θ> 9/10。我们证明了一个正整数N可以表示为一个非平凡的3 k次幂的和或差,使用大小不超过B的整数,以O(B^θN^{1/10})的方式,提供N << B^{3/13}。这一点的意义在于我们可以取θ严格小于1。我们还证明了估计O(B^{10/k}),(服从N << B),这对于大k更好。结果扩展到表示由任意固定的非奇异三元。然而,“非平凡”必须被适当地定义。考虑奇异形式x^{k-1}y-z^k,我们可以建立p^k+c的无(k-1)值的渐近公式,当p在素数上运行时,回答了胡利提出的一个问题。

英文摘要:

Let k>2 be a fixed integer exponent and let θ> 9/10. We show that a positive integer N can be represented as a non-trivial sum or difference of 3 k-th powers, using integers of size at most B, in O(B^θN^{1/10}) ways, providing that N << B^{3/13}. The significance of this is that we may take θstrictly less than 1. We also prove the estimate O(B^{10/k}), (subject to N << B) which is better for large k. The results extend to representations by an arbitrary fixed nonsingular ternary from. However ``non-trivial'' must then be suitably defined. Consideration of the singular form x^{k-1}y-z^k allows us to establish an asymptotic formula for (k-1)-free values of p^k+c, when p runs over primes, answering a problem raised by Hooley.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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