Python MatrixSymbol.inv示例

示例#1

def test_inv():
    B = MatrixSymbol('B', 3, 3)
    assert B.inv() == B**-1

    # https://github.com/sympy/sympy/issues/19162
    X = MatrixSymbol('X', 1, 1).as_explicit()
    assert X.inv() == Matrix([[1 / X[0, 0]]])

    X = MatrixSymbol('X', 2, 2).as_explicit()
    detX = X[0, 0] * X[1, 1] - X[0, 1] * X[1, 0]
    invX = Matrix([[X[1, 1], -X[0, 1]], [-X[1, 0], X[0, 0]]]) / detX
    assert X.inv() == invX

示例#2

文件： test_matexpr.py 项目： tony32769/sympy

def test_inv():
    B = MatrixSymbol('B', 3, 3)
    assert B.inv() == B**-1

示例#3

文件： test_matexpr.py 项目： cklb/sympy

def test_inv():
    B = MatrixSymbol('B', 3, 3)
    assert B.inv() == B**-1