Re: choosing a branch cut
- To: mathgroup at smc.vnet.net
- Subject: [mg6356] Re: choosing a branch cut
- From: me at bc.edu
- Date: Thu, 13 Mar 1997 01:20:11 -0500 (EST)
- Organization: Boston College
- Sender: owner-wri-mathgroup at wolfram.com
I think there is no simple solution, but it might help to use
ArcTan[x,y]. Then you have only one branch cut along y=0 AND x<0.
Look at
Plot3D[ArcTan[x,y],{x,-2,2},{y,-2,2}];
versus
Plot3D[ArcTan[y/x],{x,-2,2},{y,-2,2}];
The latter has a cut along x=0.
Have fun with Multivalued functions!!