#20489: A and B bases for Iwahori-Hecke algebras
-------------------------------------+-------------------------------------
Reporter: andrew.mathas | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.2
Component: combinatorics | Resolution:
Keywords: Iwahori-Hecke | Merged in:
algebra | Reviewers:
Authors: Andrew Mathas | Work issues:
Report Upstream: N/A | Commit:
Branch: | 74ba6e2f2c7cf9cf1a63f654ba8fd108407416f9
u/andrew.mathas/TwoIwahoriHeckeBases| Stopgaps:
Dependencies: |
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Comment (by tscrim):
Hmm... I'm not sure why offhand, but the test you are doing will yield
false positives:
{{{
sage: 1/2 not in GF(3)
True
sage: 1/2 not in GF(2)
True
}}}
IMO a better test would be
{{{#!python
R = self.base_ring()
try:
R.one() / R(2)
except ZeroDivisionError:
raise ValueError("2 must be invertible")
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/20489#comment:8>
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