Re: FindMinimum is not obeying my bounds

*To*: mathgroup at smc.vnet.net*Subject*: [mg62671] Re: [mg62652] FindMinimum is not obeying my bounds*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Wed, 30 Nov 2005 06:04:23 -0500 (EST)*References*: <200511300507.AAA00125@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

On 30 Nov 2005, at 14:07, Chris Chiasson wrote: > Dear MathGroup, > > FindMinimum is not obeying my bounds: > > In[1]:= > FindMinimum[(x-1)^2,{x,-80,-100,-70}] > Out[1]= > {0.,{x\[Rule]1.}} > > Version Number: 5.2.0.0 > Platform: Windows > > How does this turn out on your computers? > > Regards, > -- > http://chrischiasson.com/contact/chris_chiasson > Yes, there is definitely something funny here, for note the following: FindMinimum[(x-1)^2,{x,-80,-100,-70}] {0.,{x->1.}} FindMinimum[Expand[(x-1)^2],{x,-80,-100,-70}] The point -70. is at the edge of the search region in coordinate 1and the computed search direction points outside the region. {5041.,{x->-70.}} I would say this indicates a bug, wouldn't you? (This is with Mathematica 5.1 for Mac OS X). Actually, I think problems with polynomial input and restrictions are better done by Minimize: Minimize[{(x - 1)^2, -100 <= x <= -70}, x] {5041, {x -> -70}} Andrzej Kozlowski

**References**:**FindMinimum is not obeying my bounds***From:*Chris Chiasson <chris.chiasson@gmail.com>