华林—哥德巴赫问题:1个立方与9个四次方

设N为充分大的整数.本文证明了对于不超过N且满足某些必要同余条件的正整数n除至多O(N^17/18+ε)之外均可以表示为p₁³+p₂⁴+p₃⁴+p₄⁴+p₅⁴+p₆⁴+p₇⁴+p₈⁴+p₉⁴+p₁₀⁴的形式,其中p₁,p₂,…,p₁₀为素数.     

几乎相等的三次华林-哥德巴赫问题的例外集

本文证明了对5≤s≤8,几乎所有的满足某些同余条件的正整数N都可以表示为N=p31+···+p3s,|pi-(N/s)1/3|≤N1/3-θs,其中θ5=7261-2ε,θ6=5159-ε,θ7=11333-ε,θ8=19561-ε.     

黎曼猜想下一个素数k次幂及四个素数3次幂的华林-哥德巴赫问题

令k≥1是一个整数.在黎曼猜想成立的条件下,本文给出了n=p₁^k+p₂³+p₃³+p₃⁴+p₅³平均表法个数的一个合适的渐近公式,其中p₁,p₂,p₃,p₄,p₅都是素数,推广了之前的结果.     

小区间内一个素数和三个素数的平方和问题

研究了把一个满足必要条件的自然数在小区间内分解成一个素数和三个素数平方和的问题,利用刘建亚和展涛处理扩大了的主区间的新方法,成功的缩短了小区间的长度.     

素变量具有特殊形式的哥德巴赫问题

设P_k表示素因子个数不超过k的殆素数．本文证明了对几乎所有充分大的偶数n≠2(mod6),方程n=p_1+p_2有素数解p_1,p_2,且p_1+2=P_3;对任何充分大的奇数N≠1(mod6),方程N=p_1+p_2+p_3有素数解p_1,p_2,p_3,且p_2+2=P_3, p_3+2=P_2．     

华林问题中的一些新结果

设Ｇ（ｋ）为所有充分大的正整数均可表示为不超过ｓ个正整数ｋ次方幂之和的最小ｓ．本文对Ｇ（１２），Ｇ（１３），Ｇ（１９）给出了新的估计．     

两个素数平方、四个素数立方和2的整数幂*

本文中, 作者考虑了 Linnik 型的非齐次幂的Waring-Goldbach问题.具体地说, 作者证明了所有充分大的偶数都可以表示成两个素数的平方、四个素数的立方和18个2的正整数幂之和的形式.这改进了Zhao的结果, 即需要43个2的正整数幂.     

华林问题——三个正立方及一个四次方

设 E(N)为不超过 N 且不能表示为三个正立方及一个四次方之和的正整数个数.本文证明了 E(N)N,这里 s 是任意小的正数.     

华林问题——三个正立方及一个四次方

设E(N)为不超过N且不能表示为三个正立方及一个四次方之和的正整数个数。本文证明了 E(N)<相似文献   

On the Waring-Goldbach Problem for Six Cubes and Two Biquadrates

Let P_r denote an almost prime with at most r prime factors, counted according to multiplicity. In the present paper, it is proved that for any sufficiently large even integer n, the equation

$$n = {x^3} + p_1^3 + p_2^3 + p_3^3 + p_4^3 + p_5^3 + p_6^4 + p_7^4$$

has solutions in primes p_i with x being a P₆. This result constitutes a refinement upon that of Hooley C.

     

Waring-Goldbach Problem: One Square and Nine Biquadrates

In this paper it is proved that every sufficiently large even integer N satisfying one of the congruence conditions N ≡ 10, 58, 130, or 178(mod 240) may be represented as the sum of one square and nine fourth powers of prime numbers.     

Density of Integers That Are the Sum of Four Cubes of Primes

gi. IntroductionIt is conjectured that all sufficielltly large integers e satisfying some necessaly congruenceconditions are the sum of four cubes of primes, i.e.(see e.g. [1]). Such a strong conjecture is out of reach at present; but it is reasonable, inview of the following results of Hua and Davenport respectively. A theorem of Hua[3'4] statesthst almost all positive integers, with t * 0, 12(mod 9) are the sum of five cubes of praies,while DavenPOrt's result in 12] asserts that almost all…     

On the Waring-Goldbach Problem for Fourth and Fifth Powers

It is shown that every sufficiently large integer congruentto 14 modulo 240 may be written as the sum of 14 fourth powersof prime numbers, and that every sufficiently large odd integermay be written as the sum of 21 fifth powers of prime numbers.The respective implicit bounds 14 and 21 improve on the previousbounds 15 (following from work of Davenport) and 23 (due toThanigasalam). These conclusions are established through themedium of the Hardy-Littlewood method, the proofs being somewhatnovel in their use of estimates stemming directly from exponentialsums over prime numbers in combination with the linear sieve,rather than the conventional methods which ‘waste’a variable or two by throwing minor arc estimates down to anauxiliary mean value estimate based on variables not restrictedto be prime numbers. In the work on fifth powers, a switchingprinciple is applied to a cognate problem involving almost primesin order to obtain the desired conclusion involving prime numbersalone. 2000 Mathematics Subject Classification: 11P05, 11N36,11L15, 11P55.     

Hua's Theorem on Prime Squares in Short Intervals

It is proved that every large integer N≡ 5(mod24) can be written as N = p ² ₁ + ... + p ² ₅ with each prime p _j satisfying This gives a short interval version of Hua's theorem on the quadratic Waring-Goldbach problem. Received October 14, 1999, Accepted April 17, 2000     

稀疏素数集中的Waring-Goldbach问题(Ⅱ)

本文研究了Waring-Goldbach问题(k=2)与Piatetski-Shapiro素数定理的混合问题,从而进一步深化了华罗庚教授的经典结果.     

Exceptional sets in Waring-Goldbach problem for fifth powers

We consider exceptional sets in the Waring-Goldbach problem for fifth powers.For example,we prove that all but O(N^131/132)integers satisfying the necessary local conditions can be represented as the sum of 11 fifth powers of primes,which improves the previous results due to A.V.Kumchev[Canad.J.Math.,2005,57:298–327]and Z.X.Liu[Int.J.Number Theory,2012,8:1247–1256].     

On exponential sums over primes and application in Waring-Goldbach problem

In this paper, we prove the following estimate on exponential sums over primes: Let κ≥1,βκ=1/2 log κ/log2, x≥2 and α=a/q λsubject to (a, q) = 1, 1≤a≤q, and λ∈R. Then As an application, we prove that with at most O(N2/8 ε) exceptions, all positive integers up to N satisfying some necessary congruence conditions are the sum of three squares of primes. This result is as strong as what has previously been established under the generalized Riemann hypothesis.     

A Hybrid of Theorems of Goldbach and Piatetski-Shapiro

It is proved that for almost all sufficiently large even integers n, the prime variable equation n = p1 p2,p1∈Pγis solvable, with 13/15 <γ≤1, where Pγ= {p| p = [mγ/1], for integer to and prime p} is the set of the Piatetski-Shapiro primes.