--rw-rw-r-- M 53 btdn sys 196 Apr 9 2007 README --rw-rw-r-- M 53 btdn sys 182 Apr 9 2007 ellipse.pic --rw-rw-r-- M 53 btdn sys 1847 Apr 9 2007 ellipse.png --rw-rw-r-- M 53 btdn sys 310 Apr 9 2007 hyperbola.pic --rw-rw-r-- M 53 btdn sys 3328 Apr 9 2007 hyperbola.png Go to parent directory