#14163: add counit method to QSym
-------------------------------------------------+--------------------------
Reporter: saliola | Owner:
sage-combinat
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.8
Component: combinatorics | Resolution:
Keywords: qsym, hopf algebras | Work issues: implement
the counit
Report Upstream: N/A | Reviewers: Franco
Saliola, Mike Zabrocki
Authors: Mike Zabrocki, Franco Saliola | Merged in:
Dependencies: | Stopgaps:
-------------------------------------------------+--------------------------
Changes (by {'newvalue': u'Mike Zabrocki, Franco Saliola', 'oldvalue': u'Mike
Zabrocki'}):
* reviewer: => Franco Saliola, Mike Zabrocki
* author: Mike Zabrocki => Mike Zabrocki, Franco Saliola
Old description:
> The Hopf algebra of quasisymmetric functions is missing the counit
> method.
> {{{
> sage: QSym = QuasiSymmetricFunctions(QQ)
> sage: F = QSym.Fundamental()
> sage: F.counit
> sage:
> }}}
> Without the counit, {{{_test_antipode}}} at #14161 fails for QSym
New description:
The Hopf algebra of quasisymmetric functions is missing the counit method.
{{{
sage: QSym = QuasiSymmetricFunctions(QQ)
sage: F = QSym.Fundamental()
sage: F.counit
sage:
}}}
Without the counit, {{{_test_antipode}}} at #14161 fails for QSym
Apply: trac_14163_add_counit_qsym-fs.patch
--
Comment:
Since the code is identical to that of NSym, I put the method in
{{{ParentMethods}}} for bases of both algebras. Attached it an updated
patch. Mike, if you like the change, then set this to positive review.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14163#comment:2>
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 unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
