Re: Q: Linearization
- To: mathgroup at smc.vnet.net
- Subject: [mg15127] Re: Q: Linearization
- From: Rolf Mertig <rolf at mertig.com>
- Date: Wed, 16 Dec 1998 03:11:07 -0500
- Organization: Mertig Research & Consulting
- References: <754vm1$jgc@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Christoph wrote:
>
> Howdy,
>
> is there any nice way to linearize an equation in Matematica?
>
> e.g.:
> i have a function
>
> f[x,y]
>
> if i do
> Normal[Series[f[x,y],{x,0,1},{y,0,1}]]
>
> i will still have a term containing x*y, but if x and y are small i can
> discard this term. Can mathematica discard term automaticly?
>
> Christoph
>
> PS: THis is an example, I have a function with seven variables and
> don't wan't to pick the correct ones manualy.
>
> PPS: could you pleas also mail me?
Normal[Series[f[x,y]/.{x:>z x, y:>z y},{z,0,1}]]/.z->1
--
Rolf Mertig
Mertig Research & Consulting
Mathematica training and programming Development and distribution of
FeynCalc Amsterdam, The Netherlands http://www.mertig.com