Python bezout示例

示例#1

文件： test_subresultants_qq_zz.py 项目： asmeurer/sympy

def test_bezout():
    x = var('x')

    p = -2*x**5+7*x**3+9*x**2-3*x+1
    q = -10*x**4+21*x**2+18*x-3
    assert bezout(p, q, x, 'bz').det() == sylvester(p, q, x, 2).det()
    assert bezout(p, q, x, 'bz').det() != sylvester(p, q, x, 1).det()
    assert bezout(p, q, x, 'prs') == backward_eye(5) * bezout(p, q, x, 'bz') * backward_eye(5)

示例#2

文件： test_subresultants_qq_zz.py 项目： yashodeepm/sympy

def test_bezout():
    x = var('x')

    p = -2*x**5+7*x**3+9*x**2-3*x+1
    q = -10*x**4+21*x**2+18*x-3
    assert bezout(p, q, x, 'bz').det() == sylvester(p, q, x, 2).det()
    assert bezout(p, q, x, 'bz').det() != sylvester(p, q, x, 1).det()
    assert bezout(p, q, x, 'prs') == backward_eye(5) * bezout(p, q, x, 'bz') * backward_eye(5)

示例#3

文件： test_subresultants_qq_zz.py 项目： Carreau/sympy

def test_bezout():
    x = var("x")

    p = -2 * x ** 5 + 7 * x ** 3 + 9 * x ** 2 - 3 * x + 1
    q = -10 * x ** 4 + 21 * x ** 2 + 18 * x - 3
    assert bezout(p, q, x, "bz").det() == sylvester(p, q, x, 2).det()
    assert bezout(p, q, x, "bz").det() != sylvester(p, q, x, 1).det()
    assert bezout(p, q, x, "prs") == backward_eye(5) * bezout(p, q, x, "bz") * backward_eye(5)

示例#4

文件： test_subresultants_qq_zz.py 项目： msgoff/sympy

def test_bezout():
    x = var("x")

    p = -2 * x**5 + 7 * x**3 + 9 * x**2 - 3 * x + 1
    q = -10 * x**4 + 21 * x**2 + 18 * x - 3
    assert bezout(p, q, x, "bz").det() == sylvester(p, q, x, 2).det()
    assert bezout(p, q, x, "bz").det() != sylvester(p, q, x, 1).det()
    assert bezout(
        p, q, x,
        "prs") == backward_eye(5) * bezout(p, q, x, "bz") * backward_eye(5)