#4648: sparse linear algebra: nonzero_positions is slow
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Reporter: boothby | Owner: boothby
Type: defect | Status: new
Priority: minor | Milestone:
Component: linear algebra | Keywords: sparse
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Currently, generic sparse matrices inherit their nonzero_positions method
from matrix0.py. This should be trivial to fix.
{{{
def nonzero_positions(self):
return self._entries.keys()
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4648>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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