Connected digraph proof
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4.4 Prove Let D be a nontrivial connected digraph. Then D is Eulerian if and only if
od(v)=id(v) for every vertex v of D.
Od means the outdegree of a vertex v of a digraph D. (is the number of vertices of D that are adjacent from v.
id means the indegree of a vertex v of a digraph D.( is the number of vertices of D adjacent to v.
degv=odv+idv
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Solution Summary
This is a proof regarding Eulerian nontrivial connected digraphs.
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