#20973: Cartan type Aoo
-------------------------------------+-------------------------------------
Reporter: andrew.mathas | Owner:
Type: enhancement | Status: new
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 | 257b283a7b30fc46cc5bae0bbfcd12037e56eb62
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Description changed by andrew.mathas:
Old description:
> Gives a *minimal* implementation of the `A_oo` Cartan type:
> {{{#!sage
> sage: CartanType(['A',oo])
> ['A', oo]
> sage: CartanType(['A',oo]).is_irreducible()
> True
> sage: CartanType(['A',oo]).is_simply_laced()
> True
> sage: print(CartanType(['A', oo]).ascii_art())
> ...---O---O---O---O---O---O---O---...
> -3 -2 -1 0 1 2 3
> }}}
>
> In addition, the ticket fixes the following error an `CartanType`:
> {{{#!sage
> sage: CartanType(['A',-1])
> File "<string>", line unknown
>
> ^
> SyntaxError: unexpected EOF while parsing
> }}}
>
> See related discussion on [https://groups.google.com/forum/#!topic/sage-
> combinat-devel/tnQngybmlI4 sage-combinat].
New description:
Gives a ''minimal'' implementation of the `A_oo` Cartan type:
{{{#!sage
sage: CartanType(['A',oo])
['A', oo]
sage: CartanType(['A',oo]).is_irreducible()
True
sage: CartanType(['A',oo]).is_simply_laced()
True
sage: print(CartanType(['A', oo]).ascii_art())
...---O---O---O---O---O---O---O---...
-3 -2 -1 0 1 2 3
}}}
In addition, the ticket fixes the following error an `CartanType`:
{{{#!sage
sage: CartanType(['A',-1])
File "<string>", line unknown
^
SyntaxError: unexpected EOF while parsing
}}}
See related discussion on [https://groups.google.com/forum/#!topic/sage-
combinat-devel/tnQngybmlI4 sage-combinat].
--
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Ticket URL: <https://trac.sagemath.org/ticket/20973#comment:4>
Sage <http://www.sagemath.org>
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