#8327: Implement the universal cyclotomic field, using Zumbroich basis
-----------------------------------------------------+----------------------
Reporter: nthiery | Owner:
Type: enhancement | Status:
needs_review
Priority: major | Milestone: sage-5.6
Component: number fields | Resolution:
Keywords: Cyclotomic field, Zumbroich basis | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Christian Stump, Simon King | Merged in:
Dependencies: #13765, #13826 | Stopgaps:
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Comment (by stumpc5):
Replying to [comment:181 vbraun]:
> What is your problem, precisely?
When I do the lazy import of
{{{sage.rings.universal_cyclotomic_field.all.*}}} in {{{sage.rings.all}}}
(as in the current version of the patch on trac), I get
{{{
$ sage -t sage/tests/startup.py
sage -t "devel/sage-UCF/sage/tests/startup.py"
**********************************************************************
File "/home/stumpc5/progs/sage-5.5.rc0/devel/sage-
UCF/sage/tests/startup.py", line 17:
sage: sage0("'numpy' in sys.modules")
Expected:
False
Got:
True
**********************************************************************
}}}
and this test doesn't fail if I do the lazy import of
{{{UniversalCyclotomicField}}} within
{{{sage.rings.universal_cyclotomic_field.all}}}. Numpy is imported in the
cython file for the UCF, and seems to be imported on startup when doing
{{{
lazy_import("sage.rings.universal_cyclotomic_field.all","*")
}}}
but not when doing
{{{
lazy_import("sage.rings.universal_cyclotomic_field.universal_cyclotomic_field","UniversalCyclotomicField")
}}}
Do you know what goes wrong there?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8327#comment:182>
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