Re: Separating
- To: mathgroup at smc.vnet.net
- Subject: [mg20463] Re: Separating
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 27 Oct 1999 02:04:38 -0400
- Organization: Universitaet Leipzig
- References: <7v3btd$5tm@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, this can't work for your example because the -lambda ux'[x] * uy'[y] term prevent a separation. It must be somthing like -lambda*(ux[x]*uy'[y]+ux'[x]*uy[y]) Otherwise, suppose your equation is named pde than seppde=(Cancel[Expand[#/(uy[y]*ux[x]) ]] & /@ pde) //. a_. + b_ == c_ /; FreeQ[a, x] :> b == c - a will move all terms free of x to the right hand side. Hope that helps Jens Klamser wrote: > > Hi, I want to separate a pde to the independents x and y. > > Example: > > Separate SNIP SNAP ... > > to x (or y). > > Yours sincerely, Peter Klamser