Solve with assumptions

*To*: mathgroup at smc.vnet.net*Subject*: [mg57784] Solve with assumptions*From*: "Mukhtar Bekkali" <mbekkali at gmail.com>*Date*: Wed, 8 Jun 2005 03:21:33 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I need to solve equation f[x1,x2] for x1 and x2, where I know that x1>0 and x2>0 and are both real. Solve[f[x1,x2]==0,{x1,x2}] takes a lot of time to solve and when it does solve it gives me tons of unreal solutions or repetitive solutions (I have enabled Miscellanous RealOnly and instead of complex solutions it just gives me Unreal). I would like to know how I (1) can restrict the solution set where Mathematica is trying to find a solution, and (2) show only unique solutions and totally not showing Unreal ones. FindRoot is great but it is very dependent on starting values which is not good for me. Thankx, Mukhtar Bekkali