Python MatrixSymbol.as_explicit示例

示例#1

def test_as_explicit_nonsquare_symbol():
    X = MatrixSymbol('X', 2, 3)
    assert MatPow(X, 1).as_explicit() == X.as_explicit()
    for r in [0, 2, Rational(1, 2), pi]:
        pytest.raises(ShapeError, lambda: MatPow(X, r).as_explicit())

示例#2

def test_as_explicit_symbol():
    X = MatrixSymbol('X', 2, 2)
    assert MatPow(X, 0).as_explicit() == ImmutableMatrix(Identity(2))
    assert MatPow(X, 1).as_explicit() == X.as_explicit()
    assert MatPow(X, 2).as_explicit() == (X.as_explicit())**2