#15082: speedup of k-Schur functions at t=1
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Reporter: zabrocki | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-5.12
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Mike Zabrocki | Reviewers: Anne Schilling
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by aschilling):
This patch is really great. The following took almost infinite on my
machine before the patch:
{{{
sage: Sym = SymmetricFunctions(QQ); ks3 = Sym.kschur(3,1); s = Sym.s()
sage: ks3[3,3,3,2,2,1]*ks3[3,3,2,2,2]
}}}
With the patch we get
{{{
sage: Sym = SymmetricFunctions(QQ); ks3 = Sym.kschur(3,1); s = Sym.s()
sage: timeit("ks3[3,3,3,2,2,1]*ks3[3,3,2,2,2]", number=1, repeat=1)
1 loops, best of 1: 145 ms per loop
sage: ks3[3,3,3,2,2,1]*ks3[3,3,2,2,2]
ks3[3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1] + ks3[3, 3, 3, 3, 3, 3, 2, 2, 2, 2]
}}}
All tests seem to pass!
--
Ticket URL: <http://trac.sagemath.org/ticket/15082#comment:5>
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