Re: [sage-devel] Cartan matrix for a relabelled Cartan type?

[Florent Hivert]

Hi,

> When relabelling a Cartan type:
>
> sage: A3 = CartanType("A3")
> sage: A3r = A3.relabel({1:2,2:3,3:1})
>
> one loses the cartan_matrix method, which is not implemented in [...]/combinat/root_system/type_relabel.py.
>
> It would be trivial to create it: just calling the cartan_matrix method of the CartanType parent and reordering columns and rows according to the relabelling.
>
> May I open a ticket in trac?

I'm forwarding this to sage-combinat-devel, where most root system related
discussions take place.

Cheers,

Florent

[JesusTorrado]

Hi,

On Wednesday, October 3, 2012 12:15:46 PM UTC+2, fhivert wrote:

I'm forwarding this to sage-combinat-devel, where most root system related
discussions take place.

Thanks! I will follow it there, then

Cheers,
JesusTorrado

[JesusTorrado]

Hi there,

I am the author of the original question, freshly joined the group.

Cheers,
Jesús