Hello! I need some help with printing a function consisting of 3 variables. I want to plot it in the range R3 and my function is z>= Sqrt(x^2+y^2). I have tried to use ContourPlot but it just keeps failing. I do not have any limits for the variables but since ContourPlot uses it I have made up some limits but it still doesn't work. Please help! // Matilda
