Goldbach Theorem% I$ D% j4 D j1 t. P) z+ h; M4 @8 l
Union of set construction and analysis4 O- }0 d8 m$ l
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Loudi Xiaoguang mathematical research studio Su Xiaoguang; Q! X. I: {8 { ?- G
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) 3 T: C: o: e' J3 R& \) ESo when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I z" [" i# U9 v2 N: F" DNot more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。 ( o- T/ k z, o9 f8 y; C7 SKey words: Germany,Goldbach,Union of set,even number, prime number, 1 _7 F2 T' P3 u4 R+ K6 H
MR (2000) theme classification: 11 P32 ' @+ h2 t# R0 r( d( G# VEmail:suxiaoguong@foxmail. Com