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src/s/y/sympy-0.7.5/sympy/integrals/tests/test_rde.py   sympy(Download)
"""Most of these tests come from the examples in Bronstein's book."""
from sympy import Poly, S, symbols, oo, I
from sympy.integrals.risch import (DifferentialExtension,
    NonElementaryIntegralException)
from sympy.integrals.rde import (order_at, order_at_oo, weak_normalizer,
    # deg(b) == deg(D) - 1
    DE = DifferentialExtension(extension={'D': [Poly(1, x), Poly(t**2 + 1, t)]})
    assert no_cancel_equal(Poly(1 - t, t),
    Poly(t**3 + t**2 - 2*x*t - 2*x, t), oo, DE) == \
        (Poly(t**2, t), 1, Poly((-2 - 2*x)*t - 2*x, t))

src/s/y/sympy-HEAD/sympy/integrals/tests/test_rde.py   sympy(Download)
"""Most of these tests come from the examples in Bronstein's book."""
from sympy import Poly, S, symbols, oo, I
from sympy.integrals.risch import (DifferentialExtension,
    NonElementaryIntegralException)
from sympy.integrals.rde import (order_at, order_at_oo, weak_normalizer,
    # deg(b) == deg(D) - 1
    DE = DifferentialExtension(extension={'D': [Poly(1, x), Poly(t**2 + 1, t)]})
    assert no_cancel_equal(Poly(1 - t, t),
    Poly(t**3 + t**2 - 2*x*t - 2*x, t), oo, DE) == \
        (Poly(t**2, t), 1, Poly((-2 - 2*x)*t - 2*x, t))