摘要: Definition 1.1.1.Let $\sum$ be a set of points in the plane $\mathbf{R}^2$. One saysthat a point $P$ is constructible with ruler and compass from $\su... 阅读全文
posted @ 2012-09-21 21:13 叶卢庆 阅读(141) 评论(0) 推荐(0)
摘要: Definition 1.1.1.Let $\sum$ be a set of points in the plane $\mathbf{R}^2$. One saysthat a point $P$ is constructible with ruler and compass from $\su... 阅读全文
posted @ 2012-09-21 21:13 叶卢庆 阅读(153) 评论(0) 推荐(0)
摘要: 设$a0$(还剩下$\Delta x<0$的情形,以及$x_0=a$,$x_0=b$的情形,但是这些与下面的都大同小异,事实上,对于$\Delta x<0$的情形,只要下面的证明用上$\int_a^bf=-\int_b^af$就足够了),我们要证的是, \begin{equation}\label{... 阅读全文
posted @ 2012-09-21 14:48 叶卢庆 阅读(387) 评论(0) 推荐(0)