[这个贴子最后由申一言在 2009/08/19 08:55pm 第 1 次编辑]
[watermark] n
U(1")=∑(Mi/Nj), i=0,1,2,3,,,; j=1,2,3,4,,,M=2i+1,N=2j+1, M≤N,
i=0,j=1
U(1")=(1/2+1/3+,,,+1/n)+(2/3+2/4+,,,+2/n)+(3/4+3/5+,,,+3/n)+,,,+n/n. [0,1]
在单位元1",即正方形1×1内包含所有所谓小数!
0________1
↑ *a ↓ f(a)=Mi/Nj=0.a1b2c3,,,dn
↑ ↓
1--------0[/watermark] |