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Re: Positive systems

  • To: mathgroup at
  • Subject: [mg26152] Re: Positive systems
  • From: Jens-Peer Kuska <kuska at>
  • Date: Thu, 30 Nov 2000 01:03:58 -0500 (EST)
  • Organization: Universitaet Leipzig
  • References: <8vvooa$>
  • Sender: owner-wri-mathgroup at


you can't -- there exist no theorie about systems that are
restricted in half spaces.

Your solution satisfy the condition or is invalid.


Stefano Maggi wrote:
> I need to integrate from initial conditions a positive system (a system with
> all the variables to be positive or zero). How can I specify this constraint
> using NDSolve?
> Thanks in advance
> Stefano Maggi

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