#5482: Quotient ring can be created without generator names
--------------------------------+-------------------------------------------
Reporter: justin | Owner: was
Type: defect | Status: new
Priority: major | Milestone:
Component: algebraic geometry | Keywords:
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The following code works:
{{{
sage: R.<x> = PolynomialRing(QQ)
sage: f = x^2-1
sage: S = R.quotient_by_principal_ideal(f)
}}}
but then this fails:
{{{
sage: S
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
...[snip]
/Users/tmp/sage-3.4.alpha0/local/lib/python2.5/site-
packages/sage/structure/category_object.so in
sage.structure.category_object.CategoryObject.variable_names
(sage/structure/category_object.c:3530)()
ValueError: variable names have not yet been set using
self._assign_names(...)
}}}
The routine should require that the name(s) be provided.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5482>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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