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how do i use BVP4C for these kind of coupled odes?

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Sattik Basu
Sattik Basu 2018-6-26
编辑： Torsten 2018-6-27
The equations are coupled
C1 p(x) + C2 dp(x)/dx + C3 u(x) + C4 du(x)/dx = 0
C5 p(x) + C6 dp(x)/dx + C7 u(x) + C8 du(x)/dx = 0
I want to give two boundary conditions, one at each end. (thus cannot use ode45).
I have seen how bvp4c works with higher order odes with boundary value problems. the difficulty here is that the first order coupled equations both contain the first derivatives of each terms. Any help is appreciated. Thanks

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Torsten
Torsten 2018-6-27
编辑：Torsten 2018-6-27
Can you solve
C2*a + C4*b = -C1*p(x) - C3*u(x)
C6*a + C8*b = -C5*p(x) - C7*u(x)
for a and b ?
If this is the case, then
a = dp(x)/dx , b = du(x)/dx.
Best wishes
Torsten.

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