## Rocky Mountain Journal of Mathematics

### On a Waring-Goldbach problem for mixed powers

#### Abstract

Let $P_r$ denote an almost-prime with at most $r$ prime factors, counted according to multiplicity. In this paper, it is proved, among other results, that, for every sufficiently large, even integer $N$ satisfying the congruence condition $N \not \equiv 2\pmod 3$, the equation $N=x^2+p^2+p_1^3+p_2^4+p_3^4+p_4^4$ is solvable with $x$ being a $P_{5}$ and the other variable primes. This result constitutes an enhancement upon that of Vaughan \cite {s12} and Mu \cite {s9}.

#### Article information

Source
Rocky Mountain J. Math., Volume 47, Number 6 (2017), 1947-1961.

Dates
First available in Project Euclid: 21 November 2017

https://projecteuclid.org/euclid.rmjm/1511254959

Digital Object Identifier
doi:10.1216/RMJ-2017-47-6-1947

Mathematical Reviews number (MathSciNet)
MR3725251

Zentralblatt MATH identifier
06816577

#### Citation

Li, Yingjie; Cai, Yingchun. On a Waring-Goldbach problem for mixed powers. Rocky Mountain J. Math. 47 (2017), no. 6, 1947--1961. doi:10.1216/RMJ-2017-47-6-1947. https://projecteuclid.org/euclid.rmjm/1511254959

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