#11824: Bug in ring_generators for relative orders
------------------------------+---------------------------------------------
Reporter: davidloeffler | Owner: davidloeffler
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.7.2
Component: number fields | Keywords: relative order
Work_issues: | Upstream: N/A
Reviewer: Francis Clarke | Author: David Loeffler
Merged: | Dependencies:
------------------------------+---------------------------------------------
Description changed by leif:
Old description:
> The function "ring_generators" crashes for orders in relative number
> fields:
>
> {{{
> ----------------------------------------------------------------------
> | Sage Version 4.7.1, Release Date: 2011-08-11 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
> sage: K.<a,b> = NumberField([x^2 + 1, x^2 - 2])
> sage: OK = K.maximal_order()
> sage: OK.ring_generators()
> ---------------------------------------------------------------------------
> NotImplementedError Traceback (most recent call
> last)
>
> /home/masiao/<ipython console> in <module>()
>
> /usr/local/sage/sage-4.7.1/local/lib/python2.6/site-
> packages/sage/rings/number_field/order.pyc in ring_generators(self)
> 586 K = self._K
> 587 n = []
> --> 588 V, from_V, to_V = self._K.vector_space()
> 589 A = ZZ**self.rank()
> 590 remaining = [x for x in self.basis() if x != 1]
>
> /usr/local/sage/sage-4.7.1/local/lib/python2.6/site-
> packages/sage/rings/number_field/number_field_rel.pyc in
> vector_space(self)
> 1310
> 1311 """
> -> 1312 raise NotImplementedError, "For a relative number field L
> you must use either L.relative_vector_space() or
> L.absolute_vector_space() as appropriate"
> 1313
> 1314 def absolute_base_field(self):
>
> NotImplementedError: For a relative number field L you must use either
> L.relative_vector_space() or L.absolute_vector_space() as appropriate
> }}}
New description:
The function "ring_generators" crashes for orders in relative number
fields:
{{{
----------------------------------------------------------------------
| Sage Version 4.7.1, Release Date: 2011-08-11 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: K.<a,b> = NumberField([x^2 + 1, x^2 - 2])
sage: OK = K.maximal_order()
sage: OK.ring_generators()
---------------------------------------------------------------------------
NotImplementedError Traceback (most recent call
last)
/home/masiao/<ipython console> in <module>()
/usr/local/sage/sage-4.7.1/local/lib/python2.6/site-
packages/sage/rings/number_field/order.pyc in ring_generators(self)
586 K = self._K
587 n = []
--> 588 V, from_V, to_V = self._K.vector_space()
589 A = ZZ**self.rank()
590 remaining = [x for x in self.basis() if x != 1]
/usr/local/sage/sage-4.7.1/local/lib/python2.6/site-
packages/sage/rings/number_field/number_field_rel.pyc in
vector_space(self)
1310
1311 """
-> 1312 raise NotImplementedError, "For a relative number field L
you must use either L.relative_vector_space() or L.absolute_vector_space()
as appropriate"
1313
1314 def absolute_base_field(self):
NotImplementedError: For a relative number field L you must use either
L.relative_vector_space() or L.absolute_vector_space() as appropriate
}}}
----
Apply [attachment:trac_11824-relative_orders.patch] to the Sage library.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11824#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
