Goldbach Theorem 7 ~& u" f! k0 T$ L Union of set construction and analysis+ W i+ }& e, z8 ~7 V4 Q! E
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Loudi Xiaoguang mathematical research studio Su Xiaoguang 4 V3 R* A' b4 o, P6 [, V0 N/ o 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) ( b% ^. [4 p: F+ kSo when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I . g W0 \+ n+ M) RNot more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。 2 V( G( U! D0 d6 p4 X$ YKey words: Germany,Goldbach,Union of set,even number, prime number, ' h* T4 c; N& C4 t6 ]: h
MR (2000) theme classification: 11 P32 5 ?8 s. t6 e4 [+ F
Email:suxiaoguong@foxmail. Com