#14089: Speed improvements in affine crystals and fix of optional doctest
failure
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Reporter: aschilling | Owner: sage-combinat
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.8
Component: combinatorics | Resolution:
Keywords: crystals | Work issues:
Report Upstream: N/A | Reviewers: Nicolas M. Thiery
Authors: Anne Schilling | Merged in:
Dependencies: #14052 | Stopgaps:
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Comment (by nthiery):
> As for the caching of the `index_set()`, the problem is (as you stated)
this returns a mutable list rather than an immutable tuple. I tried doing
this once and from what I recall, the rigged configurations code broke
because it does something like
> {{{
> I = self.index_set()
> I.pop(0)
> }}}
> which would have to be tweaked to
> {{{
> I = self.index_set()[1:]
> }}}
Or just: {{{self.cartan_type().classical().index_set()}}} (which would
by the way be safer w.r.t. affine types where the special node would
not be 0).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14089#comment:8>
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