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PROCEEDINGS OF THE LONDON MATHEMATICAL SOCIETY
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1112/plms.12557
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This paper proves the existence of infinitely many prime numbers of the form X^2+(Y^2+1)^2 and X^2+(Y^3+Z^3)^2. This extends the work of Friedlander and Iwaniec, who showed the existence of infinitely many prime numbers of the form X^2+Y^4 and obtained an asymptotic formula for them.
We show that there are infinitely many primes of the form X2+(Y2+1)2$X<^>2+(Y<^>2+1)<^>2$ and X2+(Y3+Z3)2$X<^>2+(Y<^>3+Z<^>3)<^>2$. This extends the work of Friedlander and Iwaniec showing that there are infinitely many primes of the form X2+Y4$X<^>2+Y<^>4$. More precisely, Friedlander and Iwaniec obtained an asymptotic formula for the number of primes of this form. For the sequences X2+(Y2+1)2$X<^>2+(Y<^>2+1)<^>2$ and X2+(Y3+Z3)2$X<^>2+(Y<^>3+Z<^>3)<^>2$, we establish Type II information that is too narrow for an aysmptotic formula, but we can use Harman's sieve method to produce a lower bound of the correct order of magnitude for primes of form X2+(Y2+1)2$X<^>2+(Y<^>2+1)<^>2$ and X2+(Y3+Z3)2$X<^>2+(Y<^>3+Z<^>3)<^>2$. Estimating the Type II sums is reduced to a counting problem that is solved by using the Weil bound, where the arithmetic input is quite different from the work of Friedlander and Iwaniec for X2+Y4$X<^>2+Y<^>4$. We also show that there are infinitely many primes p=X2+Y2$p=X<^>2+Y<^>2$ where Y$Y$ is represented by an incomplete norm form of degree k$k$ with k-1$k-1$ variables. For this, we require a Deligne-type bound for correlations of hyper-Kloosterman sums.
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