TypeError: cannot solve differential equation
I am trying to use sagemath to solve a system of ordinary differential equation. However, I failed and got an TypeError (This returns the following error: TypeError: Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation may help). Here is my code for it. Could anyone help me with this? Thank you.
A=Matrix([[5/3, -4/3], [4/3, -5/3]])
B=Matrix([[2],[1]])
C=Matrix([-1,2])
D=Matrix([0])
t = var('t')
X=symb_mat(2,1,'X',t);
diffeqns = [eql == eqr \
for (eql,eqr) in zip(*[diff(X,t).list(),(A*X+B*u).list()])]
desolve_system(diffeqns,X.list(),ics=[0,1,2],ivar=t)
Would you mind typing your code in a way that makes it readable ?
Also, what is your
symb_matfunction ? I'm running H. sapiens sapiens L. v 1.0, without divinatory processor nor telepathic interface...Thnks,
calc314: now one can read the code. But that still doesn't tell us whatsumb_matis supposed to do...I also see something called
uused in the penultimate line, without a clue about what it could be.