著名的Riemann函数大家都很熟悉了，但是关于它的图像你是否清楚呢？除了最上面那几点，其他都很难画吧？你想不想看看下面那些“挤在一起”的点是怎样分布的呢？还有几何中的马鞍面、单叶双曲面等是怎样由直线生成的，是不是也想目睹一下呢？这些，都离不开绘图．-We are all familiar with the famous Riemann function, but about the image you clear it? In addition to those points of the top, the other is difficult to draw it? Do you want to take a look at the "huddled together" following the distribution point? Surface geometry of the saddle, hyperboloid of one sheet how generated by the straight line, is not also want to see what the? These are inseparable from the drawing.