Re: Symbolic calculation problem
- To: mathgroup at smc.vnet.net
- Subject: [mg37786] Re: Symbolic calculation problem
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 13 Nov 2002 01:10:51 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <aqqdv0$sfs$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
> I have problem to calculate exact answer.
>
> Input:
>
> {a, b} == Inverse[{{c, d}, {e, c}}.{{c, e}, {i, c}}].{c, e}
and
Inverse[{{c, d}, {e, c}}.{{c, e}, {i, c}}].{c, e} // FullSimplify
gives
{c/(c^2 - e*i), i/(-c^2 + e*i)}
>
> And output (I cant paste it here):
>
> http://www.ee.oulu.fi/~poy/Math.jpg
>
> So you can see the problem (It doesnt subtract all like:
> -r/(s+w)+(r+t)/(s+w) have to be t/(s+w)).
>
> Second proble:
>
> How i do that in Mathematica 4.2:
>
> {a,b}=={c,d}
> {w1,w2}={x1*c+x2*d,x3*c+x4*d}
>
> and then solve (place beore symblic calculations)
>
> H=w1*a+w2*b
>
> ??
Do you mix up Set[] (=) and Equal[] (==) ?
It is not clear what you whant. Can you
explain it ?
Regards
Jens
