Re: Solve and using the solutions further
- To: mathgroup at smc.vnet.net
- Subject: [mg38342] Re: Solve and using the solutions further
- From: Rainer Gruber <rainer.gruber at gmx.at>
- Date: Thu, 12 Dec 2002 01:36:50 -0500 (EST)
- Organization: Johannes Kepler Universitaet Linz
- References: <at4c5l$eno$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Angela Birk wrote:
> Hi,
> I am trying to solve 3 equations on 3 variables --- which is solveable.
> After that I want to use only the positive solutions of the three
> variables for further calculations. I tried to use the Select command in
> connection with the Solve command, but I get only an empty list.
>
> [...]
Try
Cases[sol, {(_ -> _?Positive) ..}]
where 'sol' is the result of Solve.
Rainer