Goldbach Theorem3 q6 D! s, l4 O3 G" |' `' s" W( j
Union of set construction and analysis - Q' A* r( B; `8 f7 Y, g& {; n6 {( x5 v3 `! K+ z% ]! v, {: u% F. _: ^
Loudi Xiaoguang mathematical research studio Su Xiaoguang7 R% O# ?7 {% f K. ]# @
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) $ y$ E+ Y8 R1 F' B9 G' FSo when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I/ ?6 z% W6 O, r' l" q
Not more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。 , D. W- _3 L) { iKey words: Germany,Goldbach,Union of set,even number, prime number, 8 ^% l) B. v+ j2 t3 z) m" G7 kMR (2000) theme classification: 11 P32 7 z7 q* ^5 k& j" QEmail:suxiaoguong@foxmail. Com