#18194: Speedup of calculation of Macdonald H and Ht bases
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Reporter: zabrocki | Owner:
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-6.6
Component: combinatorics | Resolution:
Keywords: sf, days67, sage- | Merged in:
combinat | Reviewers: Travis Scrimshaw
Authors: Mike Zabrocki | Work issues:
Report Upstream: N/A | Commit:
Branch: | 54336b9146a247b6ee7ae97e47d07e0a5d5c41d0
public/combinat/mac_speedup-18194 | Stopgaps:
Dependencies: |
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Comment (by zabrocki):
We need the two subs though for this to work properly because if `t=0`
then you can't substitute `t->1/t` (as one would need to in order to
compute the `H` values from the `Ht` values), it needs to be done
symbolically and then substitute the value for `t` afterwards.
If the main culprit is are the subs then one workaround is that I can
figure out the formulas for the functions `cmunu` which work for the `H`
basis and create a separate cache for the `H` functions. This is not
ideal because then it memorizes the values for `H` and `Ht` bases
separately. On current branch it computes `Ht` values first and them
computes `H` values with `t->1/t`.
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Ticket URL: <http://trac.sagemath.org/ticket/18194#comment:25>
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