摘要: Simplicity is relative. To the great majority of mankind– mathematical ignoramuses – it is a simple fact, for instance, that 17 X 17= 289, and a complicated one that in a principal ideal ring a finite subset of a set E suffices to generate the ideal generated by E. For the reader and for others amon 阅读全文
posted @ 2011-01-20 19:18 atyuwen 阅读(2448) 评论(3) 推荐(1) 编辑