Using ContourPlot when between x and y variables there is a constriant

*To*: mathgroup at smc.vnet.net*Subject*: [mg69353] Using ContourPlot when between x and y variables there is a constriant*From*: "diego.aristizabal" <daristi at gmail.com>*Date*: Thu, 7 Sep 2006 23:58:54 -0400 (EDT)

Hi, I have a problem with the command ContourPlot. The point is that I want to contour plot a function which is real defined only for x>2y. In other words what I want to plot is something like this: ContourPlot[f(x,y),{x,xmin,xmax},{y,2*x,xmax}]. The problem is that Mathematica does not understand the lower bound on y when specified as 2*x. I appreciate some help. Diego.