Forests and Eulerian Graphs
Let F be a forest. Add a vertex x to F and join x to each vertex of odd degree in F. Prove that the graph obtained in this way is randomly Eulerian from x, and every graph randomly Eulerian from x can be obtained in this way.
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(1)
Proof that a graph G obtained by adding a vertex V to a forest F and connecting V with each vertex of odd degree in F is Eulerian and V is a randomly Eulerian vertex in it.
A forest is a disjoint union of trees, and a tree is a a graph in which any two vertices are ...
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