Comment #2 on issue 4114 by [email protected]:
ImmutableMatrix.is_zero is always False
http://code.google.com/p/sympy/issues/detail?id=4114
Thanks Matthew, but unfortunately it's not that simple. Adding
is_zero=DenseMatrix.is_zero was the first thing I tried, and
ImmutableMatrix.is_zero still returns False. Even setting is_zero='asdf'
results in ImmutableMatrix.is_zero returning False. This isn't just a
multiple inheritance issue, because something is overriding is_zero after
the class is defined. Something to do with the metaclasses of Basic,
perhaps?
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