Add error for cycle among nonbreakable branches.

HansOlsson · Nov 9, 2023 · 5b21aca · 5b21aca
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commit 5b21aca
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diff --git a/chapters/connectors.tex b/chapters/connectors.tex
@@ -945,6 +945,8 @@ \subsubsection{Spanning Trees}
   If a graph of this set does not contain any definite root node, then one potential root node in this subgraph that has the lowest priority number is selected to be the root of that subgraph.
   The selection can be inquired in a class with function \lstinline!Connections.isRoot!, see table above.
 \end{enumerate}
+\item
+  If there is a cycle among nonbreakable branches it is an error, as it is not possible to construct a spanning tree.
 \item
   For a subgraph with $n$ selected roots, optional spanning-tree edges are removed such that the result is a set of $n$ spanning trees with the selected root nodes as roots.
 \end{enumerate}