def test_issue_19841():
G1 = GUE('U', 2)
G2 = G1.xreplace({2: 2})
assert G1.args == G2.args
X = MatrixSymbol('X', 2, 2)
G = GSE('U', 2)
h_pspace = RandomMatrixPSpace('P', model=density(G))
H = RandomMatrixSymbol('H', 2, 2, pspace=h_pspace)
H2 = RandomMatrixSymbol('H', 2, 2, pspace=None)
assert H.doit() == H
assert (2 * H).xreplace({H: X}) == 2 * X
assert (2 * H).xreplace({H2: X}) == 2 * H
assert (2 * H2).xreplace({H: X}) == 2 * H2
assert (2 * H2).xreplace({H2: X}) == 2 * X
def test_issue_19841():
G1 = GUE('U', 2)
G2 = G1.xreplace({2: 2})
assert G1.args == G2.args