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I've been asked to solve a system of differential equations using maple (for practice, as it is solvable by hand...), but I seem to be running into goop with syntax...

d/dt r(t) = -lambda_r*r(t) + alpha*lambda_u*u

d/dt p(t) = -lambda_p*p(t) + lambda_r * r(t)

with initial conditions r(0) = r_0 and p(0) = p_0

So I put this in maple:

de1 := diff(R(t),t) = -lambda[r]*R(t)+alpha*lambda[u]*U;

de2 := diff(P(t),t) = -lambda[p]*P(t)+lambda[r]*R(t);


dsol := dsolve({de1, de2}, {R(t), P(t)});

gets me R(t) and P(t) but when do I plug in the initial conditions? Is that afterwards on dsol[1] and dsol[2], or should I be doing that when I do the dsolve somehow?

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What does the included help say? In Maple, type ?dsolve to get it. I would try dsolve({de1, de2, R(0)=r0, P(0)=p0}, {R(t), P(t)}); –  GEdgar Feb 23 '13 at 2:26
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1 Answer

up vote 1 down vote accepted

As GEdgar wrote in the comments, the initial conditions should be included along with the differential equations. Here is an example from Maple help file that you get by entering ? dsolve:

ODE example

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Awesome. Thank you!! –  SetSlapShot Feb 25 '13 at 20:25
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