Goldbach Theorem 1 |! F$ G3 }2 r5 U8 e' V/ U Union of set construction and analysis : o6 z: Q1 d! K$ _3 W1 l / G) u# n; m- ~, V2 G2 I; v5 `, i# Y Loudi Xiaoguang mathematical research studio Su Xiaoguang , Z( ]' h9 W1 Q# n2 h8 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)5 V# ~% P+ c# z3 V% D# H
So when N> 800000 when, D(N)No less than1.8432(1-1/logN)N/log^2_(N-2);I , L0 |' W2 L) \: ?- \0 cNot more than5.0176[1+2/logN +o(1)]N/log[(N-2)/2]log(N-2)。7 `9 I9 p2 B" e. m6 U
Key words: Germany,Goldbach,Union of set,even number, prime number, 4 j; {: R( ^% \2 z. k5 a _MR (2000) theme classification: 11 P32 & ?3 e+ l8 A D; z* e
Email:suxiaoguong@foxmail. Com
Goldbach formula:$ f. f; v0 W, B8 O) h3 w
1.8432(1-1/log N)N/log(N-2)log(n-2)<D(N)<2.5088 S(N)N/[log(N-2)/2][log(N-2)/2] : n, B6 q. n. ~8 f8 q5 N9 YFor N>800000,D(N) mean " q) I( P/ t& K8 A0 ` N=P_1+P_2# V8 a& E' F1 w8 V
The number of elements。prime number P_1,P_2>2。( i6 ^& U6 p. a1 `. k
S(N)=1-(2 log 2 log 2)/[log(N-2)log(N-2)]-2{[ log(N-2)/2]log N(N-2)}/[2 log N log(N-2)log N/2] 4 f7 y9 I8 {5 Y' I/ K +[log N(N-2)/4]/[2 (log N/2)(log N/2)]2 d( Z7 F+ x, u% p& Y
+{2 [log(N-2)/2] [log(N-2)/2]log N(N-2)}/[log N log N log(N-2)log(N-2)]