#13766: no conversion from unit group to number field
-----------------------------+----------------------------------------------
Reporter: mderickx | Owner: tbd
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-5.6
Component: PLEASE CHANGE | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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Currently we have:
{{{
sage: L.<a>=CyclotomicField(7)
sage: a in L.unit_group()
False
}}}
This is because:
{{{
sage: a1=L.unit_group()(a)
sage: L(a1)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/Users/maarten/Dropbox/Artikelen/MazurKamiennyDerickx/tex/<ipython
console> in <module>()
/Applications/sage/local/lib/python2.6/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(sage/structure/parent.c:6820)()
/Applications/sage/local/lib/python2.6/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3254)()
/Applications/sage/local/lib/python2.6/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3157)()
/Applications/sage/local/lib/python2.6/site-
packages/sage/rings/number_field/number_field.pyc in
_element_constructor_(self, x)
6974 return self._coerce_from_str(x)
6975 else:
-> 6976 return self._coerce_non_number_field_element_in(x)
6977
6978 # TODO:
/Applications/sage/local/lib/python2.6/site-
packages/sage/rings/number_field/number_field.pyc in
_coerce_non_number_field_element_in(self, x)
5064 except (TypeError, AttributeError), msg:
5065 pass
-> 5066 raise TypeError, type(x)
5067
5068 def _coerce_from_str(self, x):
TypeError: <class
'sage.groups.abelian_gps.abelian_group_element.AbelianGroupElement'>
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13766>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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