medie2005 发表于 2008-11-30 10:59:12

mathworld Totient Function中第23个式子,其中有如下文字:
"No composite solution is currently known to
   n-1 = 0 mod phi(n)                                  (23)"

mathe 发表于 2008-11-30 11:28:09

No. For the first problem, n does not exist since in 3# I have proved that if there's such an 'n', there must exist an integer h so that $1+2^{h-1}-=n-=1(mod 2^h)$. It is impossible.

mathe 发表于 2008-11-30 11:30:09

原帖由 无心人 于 2008-11-29 21:55 发表 http://bbs.emath.ac.cn/images/common/back.gif
呵呵
他家新装的linux没有中文输入法
No. The "中文输入法" in my windows laptop crashed. I will not rebuild the machine until next Thursday or Friday.

mathe 发表于 2008-11-30 11:31:59

And the computer in my home could not boot. It seems there's problem in the Video card. Maybe today I will reinstall it to Ubuntu after the Video card is changed.

无心人 发表于 2008-11-30 13:23:58

呵呵

谁让你笔记本不装ubuntu啊

无心人 发表于 2008-11-30 13:24:42

另外，万能五笔似乎可以不依赖于系统输入法的工具条

mathe 发表于 2008-11-30 16:04:48

Now I am installing Ubuntu in my desktop.

无心人 发表于 2008-11-30 20:11:55

:)

Desktop Computer?还是Laptop Desktop?

mathe 发表于 2008-12-1 20:30:06

Desktop就是台式机呀:)

无心人 发表于 2008-12-2 08:52:50

还是不想在笔记本装ubuntu?
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