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2013•arXiv (Cornell University)Open access

Symmetric Bipartite Graphs and Graphs with Loops

Grant Cairns, Stacey Mendan

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Abstract

We show that if the two parts of a finite bipartite graph have the same degree sequence, then there is a bipartite graph, with the same degree sequences, which is symmetric, in that it has an involutive graph automorphism that interchanges its two parts. To prove this, we study the relationship between symmetric bipartite graphs and graphs with loops.

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What this paper is about

We show that if the two parts of a finite bipartite graph have the same degree sequence, then there is a bipartite graph, with the same degree sequences, which is symmetric, in that it has an involutive graph automorphism that interchanges its two parts. To prove this, we study the relationship between symmetric bipartite graphs and graphs with loops.

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Available abstract

We show that if the two parts of a finite bipartite graph have the same degree sequence, then there is a bipartite graph, with the same degree sequences, which is symmetric, in that it has an involutive graph automorphism that interchanges its two parts. To prove this, we study the relationship between symmetric bipartite graphs and graphs with loops.

Key concepts: Bipartite graph, Combinatorics, Mathematics, Cograph, Vertex-transitive graph, Edge-transitive graph, Line graph, Symmetric graph

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