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Re: Re: solve errors...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43074] Re: [mg43064] Re: [mg43046] solve errors...
  • From: Selwyn Hollis <selwynh at earthlink.net>
  • Date: Mon, 11 Aug 2003 02:15:54 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On Sunday, August 10, 2003, at 01:46  AM, sean kim wrote:

>>
>
> 1. How do I tell the mathematica to ignore the solutions that are not
> real and  not positive?  isn't there a option for solve? I remember
> something vaguely about some kinda options for solve that allow you to
> do that... I can't remember the details or where I saw them..

No way I can think of, except to discard them at the end.

> 2. i was going to ask this the other day, but the stopping test that
> you used in reply to sabrina's question... where is that from?  can i
> get some more information on that some place? It sounded like she
> wanted to get the EC50 of some kinda enzyme. so if x[t] is at it's half
> maximal, then it's called the EC50 for the ezyme noted as the x[t] in
> enzymatics. ( lotta biologist are in this forum. that's so funny)

StoppingTest is still undocumented for some reason. I'd never have 
known about it, had someone not asked about it in MathGroup.

>
> 3. your DE package seems to cause soem errors in my Mathematica 4.0
> <<DiffEqs`DEGraphics`
> SetDelayed::"write": "Tag \!\(FilterOptions\) in \
> \!\(FilterOptions[\(\(command_Symbol, options___\)\)]\) is Protected."
> SetDelayed::"write": "Tag \!\(FilterOptions\) in \
> \!\(FilterOptions[\(\(opts_List, options___\)\)]\) is Protected."
>
> is this a Mathematica version specific thing?  can i still use it? 
> even with
> the errors shown?

Not sure. This is the first I've heard of that. I'll look into it.

-----
Selwyn Hollis
http://www.math.armstrong.edu/faculty/hollis


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