前几天又反复听了Michael Jackson 的歌,总想写点什么。 这两个星期对MJ的报道铺天盖地,正面的负面的,眼花缭乱,难辩真假。。。。还好我是个没有耐心的人,无意去看这些记者的长篇累牍。我只做我想做的:就是去看他的MV,听他的歌。我简单地认为,要去了解一个人,这是最简单最直接的途径。这就如同要了解一个人的数 ...
Show that the Cantor set is compact (i.e. closed and bounded) Show that the Cantor set is perfect (and hence uncountable) Show that the Cantor set has length zero, but contains uncountably many points. Show that the Cantor set does not contain any open set