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Symmetric Graph: Mathematics, Graph Theory, Graph (mathematics), Graph Automorphism, Group Action, Vertex-transitive Graph, Edge-transitive Graph, Semi-symmetric Graph, Distance-Transitive Graph - Softcover

 
9786130357214: Symmetric Graph: Mathematics, Graph Theory, Graph (mathematics), Graph Automorphism, Group Action, Vertex-transitive Graph, Edge-transitive Graph, Semi-symmetric Graph, Distance-Transitive Graph

Inhaltsangabe

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In the mathematical field of graph theory, a graph is symmetric if its automorphism group acts transitively upon ordered pairs of linked vertices (that is, upon edges considered as having a direction). Such a graph is sometimes also called 1-arc-transitive or flag-transitive. By definition (ignoring u1 and u2), a symmetric graph without isolated vertices must also be vertex transitive. Since the definition above maps one edge to another, a symmetric graph must also be edge transitive. However, an edge-transitive graph need not be symmetric, since a—b might map to c—d, but not to d—c. Semi-symmetric graphs, for example, are edge-transitive and regular, but not vertex-transitive.

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Reseña del editor

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In the mathematical field of graph theory, a graph is symmetric if its automorphism group acts transitively upon ordered pairs of linked vertices (that is, upon edges considered as having a direction). Such a graph is sometimes also called 1-arc-transitive or flag-transitive. By definition (ignoring u1 and u2), a symmetric graph without isolated vertices must also be vertex transitive. Since the definition above maps one edge to another, a symmetric graph must also be edge transitive. However, an edge-transitive graph need not be symmetric, since a—b might map to c—d, but not to d—c. Semi-symmetric graphs, for example, are edge-transitive and regular, but not vertex-transitive.

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