Goldbach Theorem3 T0 {: j$ ]0 ]- X1 ]2 i2 j/ F
Union of set construction and analysis ' y, J) K M% T" W7 v: P' Q0 u1 F0 U" q' O: k
Loudi Xiaoguang mathematical research studio Su Xiaoguang: F2 l N6 W( L: \7 [) c
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) - p5 c1 c' I! P0 n c9 ^) qSo when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I" t4 o9 n/ Q5 @8 o
Not more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。' q6 i- b9 ]3 y5 X
Key words: Germany,Goldbach,Union of set,even number, prime number, . [0 M$ j5 k" X( k5 B
MR (2000) theme classification: 11 P32 ; X3 A' `6 ]$ A: t' ~" s" r7 W& xEmail:suxiaoguong@foxmail. Com