Supported by the National Natural Science Foundation of China(11271249); Supported by the Scientific and Technological Research Program of Chongqing Municipal Education Commission(1601213); Supported by the Scientific Research Program of Yangtze Normal University(2012XJYBO31)
Let φ(n) denote the Euler-totient function, we study the distribution of solutions of φ(n) ≤ x in arithmetic progressions, where n ≡ l(mod q) and an asymptotic formula was obtained by Perron formula.
Supported by National Natural Science Foundation of China(Grant No.11271249);Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20120073110059)
Let Fp be the finite field of p elements with p prime.If A is a subset of Fp and g is an element of F*p with order ν,then max{|A + g·A|,|A·A|} (ν/(ν + |A|2) )1/12|A|13/12.
Supported by National Natural Science Foundation of China(Grant No.11271249);the First-class Discipline of Universities in Shanghai
Let fk(n) be the characteristic function of n with Ω(n) = k, and T k(x,α)=∑n≤xfk(n)e(nα).The main purpose of this paper is to establish a Bombieri-type mean-value theorem for Tk(x, α), via using the ...
Supported by National Natural Science Foundation of China (Grant No.11271249);Specialized Research Fund for the Doctoral Program of Higher Education (Grant No.20120073110059)
For arbitrary c00, if A is a subset of the primes less than x with cardinality δx(logx)-1, δ≥(logx)-c0, then there exists a positive constant c such that the cardinality of A+A is larger than cδx(loglogx)-1.