#9944: categories for polynomial rings
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Reporter: robertwb | Owner: nthiery
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.1
Component: categories | Resolution:
Keywords: | Work_issues:
Upstream: N/A | Reviewer: Nicolas M.
Thiéry, Mike Hansen, Martin Raum
Author: Robert Bradshaw, Simon King | Merged:
Dependencies: |
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Comment(by SimonKing):
The original implementation of a polynomial basering injection relies on a
method `_new_constant_poly`, which turns out to be rather slow in most
cases except the case of dense univariate polynomials -- they have a
custom version of `_new_constant_poly`, while the others rely on a generic
implementation.
So, instead of my former suggestion ("use `one._rmul_(x)` to coerce x into
P with `one = P.one_element()`), it may be better to provide the other
polynomial classes with a faster implementation of `_new_constant_poly`.
That's what I am trying now.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9944#comment:54>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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