Re: On Reduce
- To: mathgroup at smc.vnet.net
- Subject: [mg72044] Re: [mg72011] On Reduce
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Sat, 9 Dec 2006 06:09:53 -0500 (EST)
- References: <200612081118.GAA20205@smc.vnet.net>
On 8 Dec 2006, at 20:18, Virgil Stokes wrote:
> I have the following small piece of Mathematica code that works
> fine for
> my purposes.
>
> BInv = {{ 1/4, 1/4, 0},
> {-1/2, 1/2, 0},
> { 3/4, -5/4, 1}}
> B = Inverse[BInv]
> b = {4 + \[Delta], 8, 10};
> BInv.b // FullSimplify
> Reduce[{%[[1]] >= 0, %[[2]] >= 0, %[[3]] >= 0}, {\[Delta]}]
> % /. {\[Delta] -> b1 - 4} // FullSimplify
>
> which gives
>
> 0 <= b1 <= 8
>
> which is of course correct. But, how can I use (access) the values
> 0 and 8?
> That is, I would like to now use these values in some expressions that
> would follow this.
>
> Thanks,
> V. Stokes
>
Do you mean you wan tot extract the pair {0,8} as a list? There are
lots of way, e.g.
Cases[%,_?NumericQ]
{0,8}
Andrzej Kozlowski
- References:
- On Reduce
- From: Virgil Stokes <vs@it.uu.se>
- On Reduce