Re: Problem with parametric minimization

*To*: mathgroup at smc.vnet.net*Subject*: [mg90264] Re: Problem with parametric minimization*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Fri, 4 Jul 2008 03:55:31 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <g4fhkl$9gs$1@smc.vnet.net> <g4flqh$c93$1@smc.vnet.net> <g4i962$3e9$1@smc.vnet.net>

Stephan Heckmueller wrote: > Hi, > unfortunately I forgot to insert spaces between > the constants and the variable in my previous posting. > But as I said, it's the example from the mathematica > documentation only copy-pasted. > None of the alternatives work though. I'm using version > 5.2. Might that be a problem? Possible. It works fine on my system (64-bit Intel Mac OS X 1.5.4 Mathematica 6.0.2) In[1]:= Minimize[a*x^2 + b*x + c, x] Out[1]= {Piecewise[{{c, (b == 0 && a == 0) || (b == 0 && a > 0)}, {(-b^2 + 4*a*c)/(4*a), (b > 0 && a > 0) || (b < 0 && a > 0)}}, -Infinity], {x -> Piecewise[{{0, (b == 0 && a == 0) || (b == 0 && a > 0)}, {-(b/(2*a)), (b > 0 && a > 0) || (b < 0 && a > 0)}}, Indeterminate]}} In[2]:= $Version Out[2]= "6.0 for Mac OS X x86 (64-bit) (February 7, 2008)" Regards, -- Jean-Marc > Thanks, > Stephan > > Jens-Peer Kuska wrote: > >> Hi, >> >> try: >> >> Minimize[a*x^2 + b*x + c, x] >> >> Regards >> Jens >> >> Stephan Heckmueller wrote: >>> Hello, >>> I have a problem with with the examples for using the >>> Minimize function given in the documentation on wolfram.com: >>> >>> When trying: >>> >>> Minimize[ax^2+bx+c,x] >>> >>> I receive the following error: >>> >>> Minimize::objv: >>> The objective function c+bx+ax^2 contains a nonconstant >>> expression c independent of variables (x). >>> >>> Is there something wrong with the command or the >>> documentation? >>> >>> Thanks. >>> >>> > >