#20973: Cartan type Aoo
-------------------------------------+-------------------------------------
Reporter: andrew.mathas | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.3
Component: combinatorics | Resolution:
Keywords: Cartan type, A | Merged in:
infinity |
Authors: Andrew Mathas | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/andrew.mathas/cartan_type_aoo | 9778f9738c6bf83c66f51ff22ba722e75e96d6ba
Dependencies: | Stopgaps:
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Comment (by nthiery):
Just a brief note for now: for the syntax for the various types of
infinity, what about using
{{{
sage: CartanType(['A',\NN])
sage: CartanType(['A',\ZZ])
}}}
The implementation could be generic and handle both, and even more (e.g.
if someone would want to use positive integers as index set). We could
even imagine sharing some stuff with the finite case, but that's probably
overdesign.
`CartanType(['A',oo])` could be set as an alias to either of them. I would
tend to use `\ZZ`, as the other is a parabolic subtype, but I don't know
the field enough to know which one would be the natural default for a
mathematician there.
--
Ticket URL: <https://trac.sagemath.org/ticket/20973#comment:17>
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