Goldbach Theorem : S& E2 T1 W& B) v1 B+ t Union of set construction and analysis 4 d# F7 H3 u6 k" b& p; Y 3 O, c6 T. t" I& ~ Loudi Xiaoguang mathematical research studio Su Xiaoguang! g7 A) d2 ~) {) r0 ~$ g! d& @
Abstract: In the analytic number theory Goldbach problem is an important issue. The authors studied the:A={N │ N = (N-i) + i, N is a natural number, i belong to N} Clearly A is a countable set。C={N │ N = Pi + Pj, N is even number, Pi, Pj is prime number,i, j is natural number} Clearly, C is A subset。So C is a countable set.If x ={x|x no less than 6 and not more than N is an even number,x=P1+P2, P1, P2 is prime number},card (x)=M (x).Clearly, x is C subset。So x is a countable set.We can get the M(x) range,If N ={N|N = P1 + P2, N is even number, P1, P2 is prime number},card (N)=D(N),D(N)=M(N)-M(N-2) * V6 I$ Y2 U$ |; b8 nSo when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I. ?- n8 }+ _& A6 d( U, v& K
Not more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。0 {! G; w6 S) c2 o* V9 I4 m' @* a/ v
Key words: Germany,Goldbach,Union of set,even number, prime number, ! `% [% \0 J5 K% u9 l5 |
MR (2000) theme classification: 11 P32 ' a' m5 u" o0 v( oEmail:suxiaoguong@foxmail. Com