Goldbach Theorem 7 q) k% g( N, L/ E Union of set construction and analysis% A4 e: q$ r( k' V! h
) M# v+ d/ J: P# b: }! k9 x Loudi Xiaoguang mathematical research studio Su Xiaoguang! Y9 `- L, {; A; R) E3 s* d# h
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)) E+ e2 Z$ C' r' c" d# v
So when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I 2 `/ e" ]; G8 mNot more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。* ?- N# x, t, j, v/ D$ K. d) ?
Key words: Germany,Goldbach,Union of set,even number, prime number, 5 z; E" t4 \ F' G+ I- [
MR (2000) theme classification: 11 P32 % O5 v" F9 b& O9 p2 R$ s! R% JEmail:suxiaoguong@foxmail. Com