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Re: Coupled Differential Equations

  • To: mathgroup at
  • Subject: [mg34772] Re: Coupled Differential Equations
  • From: Jens-Peer Kuska <kuska at>
  • Date: Thu, 6 Jun 2002 01:54:54 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <adkf9d$9u8$>
  • Reply-to: kuska at
  • Sender: owner-wri-mathgroup at


something like

n = 5;
  V[k]'[t] == 
    V[k][t] + Sum[V[k][t]*V[j][t]*(1 - KroneckerDelta[j, k]), {j, 0,
n}], {k, 
    0, n}]



Cyrill Slezak wrote:
> I understand that NDSolve will solve a set of first order coupled. diff.eqn.
> Here is my problem: I have a set of 20+ equation that all have the exact
> same structure and I can't seem to find an easy way to input them. For any
> help I'd be highly appreciative. The equations are of the form
> d V_k(l)/d l = V_k(l) + Sum[ V_k'(l), (k not equal k')]
> where k is the number of diff. eqn.
> Thanks for any help,
> Cyrill

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