#10926: is_gamma0_equiv on Cusps in wrong
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Reporter: wuthrich | Owner: craigcitro
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7
Component: modular forms | Keywords: cusps Gamma0
Author: wuthrich | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: new => needs_review
* author: => wuthrich
Comment:
The patch solves the bug. It also changes the output of is_gamma0_equiv.
Now, we give back all of the matrix , not just the upper left entry.
The patch does not change the output of _is_equiv in boundary.py of
modular_symbols.
The disadvantage is that the computations may be slightly slower, but only
by a few gcd calculations at worst. On the other hand I believe that the
output now is much more useful for the user.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10926#comment:1>
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