Dear Aaron,
Thank you for your message and explanation!
I opened an issue:
https://github.com/sympy/sympy/issues/13805
and pasted your comments there;
best wishes,
gosia
2017-12-23 4:46 GMT+01:00 Aaron Meurer :
> I would consider this to be a bug in det(). It should try to compute
> it in such a
The problem is that the solver needs to know the sign of a certain
expression in terms of the coefficients (the discriminant of a polynomial),
and it cannot determine the sign based on the information given, as the
discriminant ends up being `D = (1/(c2*r2) - 1/(c1*r1))**2`. Symbols are
not aut
Hello,
I have the following script .
import sympy as sym
i, r1, c1, r2, c2, t = sym.symbols('i, r1, c1, r2, c2, t' )
x1 = sym.Function('x1')
x2 = sym.Function('x2')
eq1 = r1*c1*sym.Derivative(x1(t),t) + x1(t) - x2(t) - r1*i
eq2 = r2*c1*sym.Derivative(x1(t),t) + r2*c2*sym.Derivative(x2(t),t) + x
