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Matrix transposition.

src/s/y/sympy-HEAD/sympy/matrices/expressions/tests/test_indexing.py   sympy(Download)
def test_transpose_index():
    assert X.T[i, j] == X[j, i]
 
 
def test_Identity_index():

src/s/y/sympy-0.7.5/sympy/simplify/tests/test_cse.py   sympy(Download)
 
    expr1 = (A.T*A).I * A * y
    expr2 = (A.T*A) * A * y
    replacements, reduced_exprs = cse([expr1, expr2])
    assert len(replacements) > 0

src/s/y/sympy-0.7.5/sympy/matrices/expressions/tests/test_indexing.py   sympy(Download)
def test_transpose_index():
    assert X.T[i, j] == X[j, i]
 
 
def test_Identity_index():