Re: How to declare vectors for solving
- To: mathgroup at smc.vnet.net
- Subject: [mg106470] Re: How to declare vectors for solving
- From: dh <dh at metrohm.com>
- Date: Thu, 14 Jan 2010 05:45:40 -0500 (EST)
- References: <hik907$6mo$1@smc.vnet.net>
Hi John,
the components need not have values, but you need at least a name.
Either you write your vectors in component form, but then you have to
name the components. Or you write the vectors symbolically, but then
Cross[a,b] is a new vector and can not be evaluated further.
Daniel
John Rivers wrote:
> currently I do this:
>
> a = {ax, ay, az};
> b = {bx, by, bz};
>
> then I can work with Cross[a, b] etc.
>
> and then Solve[]
>
> is there a way to declare a as a vector with 3 elements - but not give
> values?
>
>
>