Loading [MathJax]/jax/output/HTML-CSS/jax.js
Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

graph edge labels

I need an illustration of some (sub)poset of positive roots. I have a working code that produces correct labels, but they are written as sums of simple roots. I.e. the resulting graph (when exported to LaTeX) has labels such as α1+α2. I would like to have these labels in ϵ-notation. I.e. the previous example would read ϵ1ϵ3.

click to hide/show revision 2
No.2 Revision

epsilon basis for roots (was graph edge labelslabels)

I need an illustration of some (sub)poset of positive roots. I have a working code that produces correct labels, but they are written as sums of simple roots. I.e. the resulting graph (when exported to LaTeX) has labels such as α1+α2. I would like to have these labels in ϵ-notation. I.e. the previous example would read ϵ1ϵ3.

RootSystem has an ambient_space method that provides an access epsilon basis, but

  1. I am not clear on converting between these two bases

and

  1. output to LaTeX should really use ϵ1ϵ3 rather than (1,0,1).
click to hide/show revision 3
retagged

updated 10 years ago

FrédéricC gravatar image

epsilon basis for roots (was graph edge labels)

I need an illustration of some (sub)poset of positive roots. I have a working code that produces correct labels, but they are written as sums of simple roots. I.e. the resulting graph (when exported to LaTeX) has labels such as α1+α2. I would like to have these labels in ϵ-notation. I.e. the previous example would read ϵ1ϵ3.

RootSystem has an ambient_space method that provides an access epsilon basis, but

  1. I am not clear on converting between these two bases

and

  1. output to LaTeX should really use ϵ1ϵ3 rather than (1,0,1).