Hello,
I am trying to solve a small system of ODEs, following the tutorial on
the SAGE homepage; however, I only receive an error message. What am I
doing wrong?
Here is my code:
====================
t = var ('t')
S_0 = 1.5
X_0 = 0.05
Y_XS = 0.5
K_S = 0.007
mu_max = 0.8
X = function ('X', t)
S = function ('S', X)
mu = function ('mu', S)
dXdt = diff (X, t) == mu * X
dSdt = diff (S, t) == -mu * X / Y_XS
mu = (mu_max * S) / (K_S + S)
desolve_system ([dXdt, dSdt], [X, S], ics = [0, X_0, S_0])
====================
(Part of) the error message is:
====================
TypeError: Error executing code in Maxima
CODE:
sage7 : atvalue(sage1,sage5,sage6)$
Maxima ERROR:
Improper argument to atvalue:
['X(t)]
====================
Thanks,
Richard
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