Re: Problem with parametric minimization
- To: mathgroup at smc.vnet.net
- Subject: [mg90369] Re: Problem with parametric minimization
- From: Stephan Heckmueller <stephan.heckmueller at gmx.net>
- Date: Tue, 8 Jul 2008 02:21:53 -0400 (EDT)
- References: <g4fhkl$9gs$1@smc.vnet.net> <g4flqh$c93$1@smc.vnet.net> <g4i962$3e9$1@smc.vnet.net> <g4kl80$lqc$1@smc.vnet.net>
Hi,
it seems to be a problem of Mathematica 5.2 (at least). With 6.0.2 it works
fine.
Thanks.
Jean-Marc Gulliet wrote:
> 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.
>>>>
>>>>
>>
>>