Graph of the vertices and edges of a demihypercube
Halved cube graph
The halved cube graph 1/2Q3
Vertices
2n–1
Edges
n(n – 1)2n–3
Automorphisms
n! 2n–1, for n > 4 n! 2n, for n = 4 (2n–1)!, for n < 4[1]
Properties
Symmetric Distance regular
Notation
1/2Qn
Table of graphs and parameters
In graph theory, the halved cube graph or half cube graph of dimension n is the graph of the demihypercube, formed by connecting pairs of vertices at distance exactly two from each other in the hypercube graph. That is, it is the half-square of the hypercube. This connectivity pattern produces two isomorphic graphs, disconnected from each other, each of which is the halved cube graph.
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A.E. Brouwer, A.M. Cohen, and A. Neumaier (1989), Distance Regular Graphs. Berlin, New York: Springer-Verlag, p. 265. ISBN 3-540-50619-5, ISBN 0-387-50619-5
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combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory...
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