 of  the  Coxeter group defined by the cartan matrix <code>m</code></p><pre><code class="language-julia-repl hljs">julia&gt; C=cartan(:H,3)
3√ó3 Matrix{Cyc{Int64}}:
       2  Œ∂‚ÇÖ¬≤+Œ∂‚ÇÖ¬≥   0
 Œ∂‚ÇÖ¬≤+Œ∂‚ÇÖ¬≥        2  -1
       0       -1   2

julia&gt; coxmat(C)
3√ó3 Matrix{Int64}:
 1  5  2
 5  1  3
 2  3  1</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/jmichel7/Chevie.jl/blob/fbddb048572eb9b42fb2c8f80113717339b328da/