Re: Evaluating inequalities
- To: mathgroup at smc.vnet.net
- Subject: [mg131579] Re: Evaluating inequalities
- From: William Rummler <wrummler at wolfram.com>
- Date: Sun, 8 Sep 2013 03:05:54 -0400 (EDT)
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Sorry, I replaced False with True in my first reading. Still:
In[6]:= relation = -k^2 + w^2/KK^2 > 0;
In[7]:= assumption = w/k < KK;
In[8]:= counterExample =
FindInstance[assumption && relation, {w, k, KK}]
Out[8]= {{w -> -(3/2), k -> 1, KK -> 1}}
In[9]:= {assumption, relation} /. counterExample
Out[9]= {{True, True}}
----- Original Message -----
> Hi,
>
> Why doesn't this:
>
> Assuming[w/k < KK, -k^2 + w^2/KK^2 > 0] // Simplify
>
> evaluate to False?
>
> Thanks!
>
> Sam
>
>