if I run the code
from sympy import * v = [1,0,0] angle = 3*pi/2 q = Quaternion.from_axis_angle(v,angle) m = q.to_rotation_matrix() print (m.det())
in a debian 10 with version 1.3-2 of python3-sympy, I get -1 as a result. But this is not correct, beacause the determinant of a rotation is 1.
With sympy version 1.5.1-2.1 of ubuntu-20.04, I get the correct result.
I think this is a bug in debian 10 python3-symp and python-sympy 1.3-2
Best regards,
Rafel Amer
Technic University of Catalonia
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