References about Hasse diagrams of root systems This is to ask about references of Hasse diagrams of irreducible root systems. I found here and there nice pictures of root systems of type $E$. I would like to ask for Hasse diagrams of classical root systems ($A_n, B_n, C_n, D_n$).
Thanks in advance.
 A: Hasse diagrams for root systems can be extracted from the following paper, which can be found on E. Plotkin's publication page: 


*

*E.Plotkin, A.Semenov, N.Vavilov, Visual basic representations: An atlas, Int.Journal of Algebra and Computation, 8 (1998), no. 1, 61-95. 


The paper discusses more generally Hasse diagrams for the weights of various representations and various applications. The pictures for the adjoint representations give the Hasse diagram of the root system (but using all roots, not just the positive ones).
A: I put a LaTeX package up on CTAN today to draw the Hasse diagrams of all root systems, following Ringel's pictures. Code is as simple as
\documentclass{amsart}
\usepackage{lie-hasse}
\begin{document}
\hasseDiagrams{A4;B5}
\hasseDiagrams{F4;G2}
\end{document}

to display

A: I did some research relating to this area for:
$5$ dimensional space over $\mathbb{R}$
There isn't much to be found on the Internet other than at Wikipedia, except for:
A FAMILY OF MARKED CUBIC SURFACES AND THE ROOT SYSTEM $D_5$, by Elisabetta Colombo and Bert Van Geemen
which is detailed but has no pictures.
