Goldbach Theorem : H/ u' P( `. t4 R7 n+ R3 s# n Union of set construction and analysis0 a& d. W0 x/ Y( l' Y% Y1 }1 d% U
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Loudi Xiaoguang mathematical research studio Su Xiaoguang + K d) y* t$ U! p) M$ K3 z 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): ?& f% c" r8 ]+ C2 S, C
So when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I) ?; J/ ]* x; p( F* s! {
Not more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。 " v6 D! }) M( K% CKey words: Germany,Goldbach,Union of set,even number, prime number, 8 t' a) j! q% @1 _0 m+ L GMR (2000) theme classification: 11 P32 2 B9 A, e& M* t# _, F( q; z
Email:suxiaoguong@foxmail. Com