References etc.

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Antti H S Laaksonen 2017-02-25 21:59:02 +02:00
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@ -749,7 +749,8 @@ $2 \rightarrow 1 \rightarrow 4 \rightarrow 2 \rightarrow 5$.
\index{Kirchhoff's theorem} \index{Kirchhoff's theorem}
\index{spanning tree} \index{spanning tree}
\key{Kirchhoff's theorem} provides a way \key{Kirchhoff's theorem}\footnote{G. R. Kirchhoff (1824--1887) was
a German physicist.} provides a way
to calculate the number of spanning trees to calculate the number of spanning trees
of a graph as a determinant of a special matrix. of a graph as a determinant of a special matrix.
For example, the graph For example, the graph