Re: How to use inequalities with Solve?

*To*: mathgroup at smc.vnet.net*Subject*: [mg5771] Re: How to use inequalities with Solve?*From*: Daniel Lichtblau <danl>*Date*: Sat, 18 Jan 1997 14:58:27 -0500*Organization*: wolfram.com*Sender*: owner-wri-mathgroup at wolfram.com

Michael Hucka wrote: > > OK, this is probably a stupid question, but I just can't seem to get it > right. I have a hairy expression that I'm trying to get Mathematica to solve > using Solve (or Reduce), and in an effort to reduce the number of results, > I'd like to express that certain variables are greater than zero. Apparently > I can't use the obvious thing: > > Solve[ expr == 0 && a > 0 && b > 0, x] > > Is there some other way to achieve the same effect? Seems like there *ought* > to be a way. > > -- > Mike Hucka hucka at umich.edu <URL: http://ai.eecs.umich.edu/people/hucka> > Ph.D. candidate, computational models of human visual processing, U-M AI Lab > UNIX admin & programmer/analyst, EECS Dept., University of Michigan Solve and Reduce will not take inequalities. In version 3.0 there is a standard package, Algebra`InequalitySolve`, that may do what you want. Daniel Lichtblau Wolfram Research danl at wolfram.com