How can I insert this boundary condition?

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Elia Paini 2021-5-10

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评论： Elia Paini 2021-5-13

Hi everyone, I have an ODE system with several variables, like this:

y1' = f (y1,y2)

y2' = g (y1,y2)

I'm solving it with bvp4c.

Is it possible to enter, in addition to the BCs related to y1 and y2, also a condition on the derivatives, for example y1'(0) = 0? Should I add one equation? How?

Thank you!

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J. Alex Lee 2021-5-12

i'm not following anymore...you seem to agree that you can't have 3 BCs on 2 first order equations because that's over-specified...if you add another first order equation that is coupled in, aren't you completely changing the problem?

Elia Paini 2021-5-13

I'm agree with you... The problem is I can't have 3 bcs without adding another equation. I've just read the documentation, but it seems not clear about this

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