Updates:
Status: Accepted
Comment #4 on issue 2270 by Vinzent.Steinberg: Matrix(...) + scalar
http://code.google.com/p/sympy/issues/detail?id=2270
In mpmath we decided to implement it as 'A + x == A + ones(m, n)*x'. This
consistent with numpy:
form numpy import array
a = array([[1,2],[3,4]])
a
array([[1, 2],
[3, 4]])
a + 1
array([[2, 3],
[4, 5]])
So I think we should go this way.
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