[sage-support] Unexpected behavior of arctan2 vs arctan

HI, In the example below, why do I need to explicitely specify the function variables for atan2 in contrast to atan? sage: var('z') sage: f1(z)=2+z; f2(z)=z**2+z+1 sage: arctan(f2/f1) z|-->arctan((z^2+z+1)/(z+2)) sage: arctan2(f2,f1) Traceback (click to the left of this block for traceback)

[sage-support] Re: plotting boxes

On Sunday, September 15, 2013 12:12:39 PM UTC-7, Carl Eberhart wrote: > > I would like to restrict a 3d plot to a certain box in space, say (x,0,1) > (y,0,1),(z,.5,1.5) > This would be useful in many situations, say when you want to inspect the > part of a graph of z=f(x,y) > where z is betwe

[sage-support] plotting boxes

I would like to restrict a 3d plot to a certain box in space, say (x,0,1) (y,0,1),(z,.5,1.5) This would be useful in many situations, say when you want to inspect the part of a graph of z=f(x,y) where z is between a and b. It doesn't appear that is possible. Is there an option I am missing? Tha

[sage-support] [ANN] OpenOpt suite v 0.51

Hi all, new OpenOpt suite v 0.51 has been released: - Some improvements for FuncDesigner automatic differentiation and QP - FuncDesigner now can model sparse (MI)(QC)QP - Octave QP solver has been