#13649: Implement sigma.domain() and sigma.codomain() for sigma a permutation
----------------------------+-----------------------------------------------
Reporter: nthiery | Owner: joyner
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.5
Component: group theory | Keywords: beginner, agregation
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
----------------------------+-----------------------------------------------
Currently one needs to go through the parent of a permutation to get
its domain and codomain:
{{{
sage: G = SymmetricGroup(8)
sage: g = G.an_element()
sage: g.parent().domain()
{1, 2, 3, 4, 5, 6, 7, 8}
}}}
One would want to have shorthands:
{{{
sage: g.domain()
{1, 2, 3, 4, 5, 6, 7, 8}
sage: g.codomain()
}}}
like there are for most other maps in Sage:
{{{
sage: F = FiniteSetMaps(8)
sage: f = F.an_element()
sage: f.domain()
{0, .., 7}
sage: f.codomain()
{0, .., 7}
}}}
Bonus points for:
{{{
sage: g.image()
{1, 2, 3, 4, 5, 6, 7, 8}
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13649>
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.
