The purpose of this paper is to achieve decomposition formulas of sums regarding deviation cubes, the sum of deviation raised to the power of four and codeviance, because they allow to evaluate the contribution of dif...
Project supported by the National Natural Science Foundation of China (No.10041004) and the ThansCentury naming Programme Foun
Using the circle method and sieves, the author proves that a positive proportion of positive integers can be represented as the sum of four cubes of primes.
Project supported by the National Natural Science Foundation of China.
Let r(n) denote the number of representations of n as the sums of 5 cubes and 3 biquadra-tes of natural numbers. Then for all sufficiently large n, one has r(n)(?)n17/12, which is the expected order of magnitude of r(n).
Project supported by the National Natural science Foundation of China
It is shown that almost all natural numbers can be expressed as the sum of three cubes aud one fifth power of natural numbers. To be more precise, we have E(N)<
Project supported by the National Natural Science Foundation of China.
In his work on Waring’s problem for cubes and biquadrates,Brüdern has established the following: Almost all natural numbers can be expressed as the sum of three cubes and a biquadrate of natural numbers. This is com...
Project supported by the National Natural Science Foundation of China.
In the present report, we further improve the pruning technique in the Hardy-Littlewood method and advance a new method by which Vaughan’s p-adic iterative technique is applied to the problem of sums of mixed powers....