div><p><code>isrightdescent(W::CoxeterGroup,w,i::Integer)</code></p><p>returns  <code>true</code> iff the  <code>i</code>-th generating reflection  of the Coxeter group <code>W</code>  is in the  right descent set  of the element  <code>w</code> of <code>W</code>,  that is iff <code>length(W,w*W(i))&lt;length(W,w)</code>.</p><pre><code class="language-julia-repl hljs">julia&gt; W=coxsym(3)
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julia&gt; isrightdescent(W,Perm(1,2),1)
true</code></pre></div><a class="docs-sourcelink" target="_b