Re: Defining Functions and Simplifying Solutions
- To: mathgroup at smc.vnet.net
- Subject: [mg90528] Re: Defining Functions and Simplifying Solutions
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 11 Jul 2008 05:57:23 -0400 (EDT)
- Organization: Uni Leipzig
- References: <g56t8m$3pq$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
a) no it can't be simpler and a function should know the variables
b) {{a -> (0. (e1 \[Beta]1 +
e2 \[Beta]2 \[Lambda]))/(rA \[Tau]^2)}} // Chop
or
{{a ->
(0. (e1 \[Beta]1 +
e2 \[Beta]2 \[Lambda]))/(rA \[Tau]^2)}} /. 0. -> 0
Regards
Jens
Locus wrote:
> Hello!
>
> I actually have to questions:
>
> 1. Is there a more handy way to define/use functions as compared to the following way (which works, but is complicated always typing the variable definitions):
>
> G[\[Alpha]1_Real, \[Alpha]2_Real, e1_Real,
> e2_Real] = \[Alpha]1*e1 + \[Alpha]2*e2
>
> v[G_Real] = a*G[\[Alpha]1, \[Alpha]2, e1, e2] + b
>
>
> 2. After several steps, I receive the following solution
>
> {{a -> (0. (e1 \[Beta]1 + e2 \[Beta]2 \[Lambda]))/(rA \[Tau]^2)}}
>
> which obviously equals zero. How can I 'force' Mathematica to display only 0 as result and not such a unnessecarily complicated expression? FullSimplify does not work here.
>
>
> Thanks a lot!
>