Re: Maximize
- To: mathgroup at smc.vnet.net
- Subject: [mg91482] Re: Maximize
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Sat, 23 Aug 2008 01:42:36 -0400 (EDT)
On 8/22/08 at 3:12 AM, gregory.lypny at videotron.ca (Gregory Lypny) wrote: >Not sure why this won't work. I'm trying to maximize with respect >to x subject to a constraint. I get an error message saying that >the constraint is not a valid variable. >Maximize[ g + (1-g)*x -(g/2)*x^2 - (g/2)*v, >x = (a/c) + sqrt((d/c)*(v - 1/c)), >x >] You simply have to pay attention to syntax and usage if you expect meaningful results. Look up Maximize in the Document Center and you will see to maximize an expression with constraints, the expression and constraints are given to Maximize as a list. Additionally, a single "=" is an assignment operator. That is you have given Maximize three arguments, an expression you presumably want to maximize, x which you have set to what presumably was intended as your constraint and x again. I believe the problem you are attempting to solve should be expressed as: Maximize[{g+(1-g)*x-(g/2)*x^2- (g/2)*v, x==(a/c) + sqrt((d/c)*(v - 1/c))}, x]