#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: | 5e4ad59ff71c603797f7fd58d36a714a66ee6cff
public/combinat/mac_speedup-18194 | Stopgaps:
Dependencies: |
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Comment (by zabrocki):
I'm willing to leave that as the coercion path because one would not
normally convert from `Q`, `P` or `J` bases to `Ht` or `H` bases. Where
there might see a slowdown is between the `Qp` and `H` or `Ht` because
`copy(H._internal_coerce_map_from(Qp))` has the extra two steps (although
the reverse direction does not) and for mathematical reasons one *might*
want to convert between these bases.
I could write the `_self_to_s` and `_s_to_self` functions and add those as
coercions, but mathematically they are equivalent to converting between
the Schur and monomial basis.
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Ticket URL: <http://trac.sagemath.org/ticket/18194#comment:17>
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