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Thread Subject:
Differential Equations - Lotka - Volterra

Subject: Differential Equations - Lotka - Volterra

From: Paulo Guimaraes

Date: 19 Jan, 2009 03:12:02

Message: 1 of 2

Dear all,
I'd like to use the Lotka-Volterra model (such as in the Lotkademo.m) but with boundaries in such way that if the population of prey assumes zero or negative values, the populations will not change anymore, that is, the species died out (population is equal to zero). And the same is true for predators.

However, I have no cue on how to do it.

I would appreciate if someone could help me out.

Thank you very much,

Paulo

Subject: Differential Equations - Lotka - Volterra

From: Paulo Guimaraes

Date: 19 Jan, 2009 04:50:03

Message: 2 of 2

Dear all,
I'd like to use the Lotka-Volterra model (such as in the Lotkademo.m) but with boundaries in such way that if the population of prey assumes zero or negative values, the populations will not change anymore, that is, the species died out (population is equal to zero). And the same is true for predators.

However, I have no cue on how to do it.

I would appreciate if someone could help me out.

Thank you very much,

Paulo

"Paulo Guimaraes" <prguima@gmail.com> wrote in message <gl0r21$ko1$1@fred.mathworks.com>...
> Dear all,
> I'd like to use the Lotka-Volterra model (such as in the Lotkademo.m) but with boundaries in such way that if the population of prey assumes zero or negative values, the populations will not change anymore, that is, the species died out (population is equal to zero). And the same is true for predators.
>
> However, I have no cue on how to do it.
>
> I would appreciate if someone could help me out.
>
> Thank you very much,
>
> Paulo

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