ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Mon, 01 Apr 2013 11:43:19 +0200epsilon basis for roots (was graph edge labels)https://ask.sagemath.org/question/9969/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 $\alpha_1 + \alpha_2$. I would like to have these labels in $\epsilon$-notation. I.e. the previous example would read $\epsilon_1 - \epsilon_3$.
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
2. output to LaTeX should really use $\epsilon_1 - \epsilon_3$ rather than $(1,0,-1)$.vit.tucekMon, 01 Apr 2013 11:43:19 +0200https://ask.sagemath.org/question/9969/