On Tue, May 04, 2004 at 08:24:49PM +0200, Marko Riedel wrote: > plot2d(2*(x+1)/(x-1)^2,[x,-5,5]); > puts maxima into an infinite loop! I guess it is not aware of > singularities. use: plot2d(2*(x+1)/(x-1)^2,[x,-5,5], [y,-10,10]); Regards, Jaime