To add initial conditions to dsolve, you need to use the ics
parameter, like dsolve(eq, f(x), ics={f(0):1}). dsolve doesn't
currently integrate with solve to remove the I(t). You'll need to do
that separately, either before or after you run dsolve.Aaron Meurer On Thu, May 22, 2014 at 4:47 AM, Geoffrey Mégardon <[email protected]> wrote: > Hi! > > I' m trying Sympy this morning and I tried to do this: > > equations = [ > Eq(a(t).diff(t), (I(t) - gamma*a(t))/theta ), > Eq(a(0), 0), > Eq(I(t), 30) ] > > dsolve(equations, a(t)) > > I was thinking it would try to resolve the first equation with the > constraints given by the 2 others equations. > But apparently that doesn't work as I thought. > > I also tried with the function: > solve() > > But it said it can't resolve the third equation. > > Is there a simple way to resolve a set of equations like that? > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/aabdb8e2-34db-4061-b65c-808ba4c4a33c%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6LLC7GG_WFqsnOJonmBNwWp6dQbdJEhaGknhaMsNX9Ovg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
