#18447: Implement dual-quasi-Schur basis in NCSF
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Reporter: zabrocki | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.7
Component: combinatorics | Resolution:
Keywords: ncsf, qsym, | Merged in:
quasiSchur, quasisymmetric | Reviewers: Travis Scrimshaw
Authors: Mike Zabrocki | Work issues:
Report Upstream: N/A | Commit:
Branch: | 09fe2c952b5857583300ee9f7f183973289418a0
public/combinat/zabrocki/ncsf_quasi_schur_basis/18447| Stopgaps:
Dependencies: #18415 |
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Changes (by tscrim):
* cc: darij (added)
* reviewer: => Travis Scrimshaw
Comment:
Those are some nice timing improvements Mike.
I made a couple of changes which should result in a speedup to the
multiplication. I cached the output of `composition_order` in the matrix
function so that it doesn't get recomputed every time a multiplication is
done. I also did some other optimizations where I got a good speed
reduction in some of my testings.
Did you test to see what the change in timings going from the
Quasisymmetric-Schur to the Fundamental basis is? Mainly I'm wondering if
we should leave that in as a direct coercion (instead of going through the
Monomial basis) and implement an iterator over standard composition
tableaux.
--
Ticket URL: <http://trac.sagemath.org/ticket/18447#comment:21>
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