test_prde.py 文件源码

def test_parametric_log_deriv():
    DE = DifferentialExtension(extension={'D': [Poly(1, x), Poly(1/x, t)]})
    assert parametric_log_deriv_heu(Poly(5*t**2 + t - 6, t), Poly(2*x*t**2, t),
    Poly(-1, t), Poly(x*t**2, t), DE) == \
        (2, 6, t*x**5)