Status: NeedsDecision
Owner: [email protected]
Labels: Type-Defect Priority-Medium Matrices
New issue 2291 by [email protected]: is_diagonal should not check for
square
http://code.google.com/p/sympy/issues/detail?id=2291
The Matrix method is_diagonal should work with non-square matrix too.
In a way similar to how the is_upper and is_lower don't check for square.
Matrices like
[1, 0, 0, 0]
[0, 1, 0, 0]
[0, 0, 1, 0]
and
[1, 0, 0, 0]
[0, 1, 0, 0]
[0, 0, 1, 0]
[0, 0, 0, 1]
[0, 0, 0, 0]
should also be considered diagonal.
If modifying is_diagonal is not acceptable, then perhaps we can have
another method with name asymmetric diagonal or something similar.
In SVD, the diagonal Matrix in the center can be non-square. That is the
reason I'm putting up this issue.
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