Do you mean the tuple is represented in the disjoint cycle notation and
is a cyclic permutation? In that case, you can use:
sage: PermutationGroupElement('(3,6,4)').sign()
1
sage: PermutationGroupElement('(5,3,6,4)').sign()
-1
On Mon, Jun 30, 2008 at 7:17 PM, John H Palmieri <[EMAIL PROTECTED]> wrote:
>
> Suppose I have a tuple x of distinct non-negative integers. Is there
> a quick way to find the sign of this, as a permutation of Set(x)? (I
> want to view x as the one-line permutation notation form, so (3,6,4)
> will have sign -1, while (5,3,8,6) will have sign 1.)
>
> The things I can find in combinat/... don't quite seem to do what I
> want. I can build something myself, but if there is a quick solution,
> I would prefer that.
>
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
