#14826: Newton polygons
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Reporter: caruso | Owner: roed
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-5.12
Component: padics | Resolution:
Keywords: Newton polygons | Merged in:
Authors: Xavier Caruso | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Dependencies:
Stopgaps: |
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Comment (by vbraun):
There are two ways for your elements get an `__add__` method: Either they
inherit it from `RingElement` or your category is (a refinement of)
`AdditiveMagmas`. If you don't want to have a ring (no `__neg__` method)
then you have to go the latter route. Just derive from `Element` and
initialize your category to
{{{
from sage.categories.all import Magmas, AdditiveMagmas
category = (Magmas(), AdditiveMagmas())
super(...).__init__(..., category=category)
}}}
This is roughly how the polyhedra work, except they define a new category
as the join.
--
Ticket URL: <http://trac.sagemath.org/ticket/14826#comment:17>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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