NDSolve
- To: mathgroup at smc.vnet.net
- Subject: [mg28011] NDSolve
- From: bernd at bio.vu.nl (Bernd Brandt)
- Date: Wed, 28 Mar 2001 02:40:39 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Dear group
Using NDSolve in Mathematica 4.0.2 i find something strange.
When an initial condition is equal to zero i get an undefined system, but no errors;
I have:
nd = NDSolve[{
A'[t] == -A[t]/(2 + A[t]),
B'[t] == (B[t]/ A[t]) * A'[t], A[0] == 0, B[0] == 10}, {A,
B}, {t, 0, 10}]
Only when i replace all A[t] by zero i get the expected behaviour
(infinite expression 1/0 encountered).
Is this normal or am i expecting wrong behaviour?
Kind regards,
Bernd