Matchings in Lattice Graphs and Hamming Graphs

Author(s):  
M. Aigner ◽  
R. Klimmek
1994 ◽  
Vol 3 (2) ◽  
pp. 157-166
Author(s):  
Martin Aigner ◽  
Regina Klimmek

In this paper we solve the following problem on the lattice graph L(m1,…,mn) and the Hamming graph H(m1,…,mn), generalizing a result of Felzenbaum-Holzman-Kleitman on the n-dimensional cube (all mi = 2): Characterize the vectors (s1.…,sn) such that there exists a maximum matching in L, respectively, H with exactly si edges in the ith direction.


Author(s):  
Evgeny A. Bespalov ◽  
Denis S. Krotov ◽  
Aleksandr A. Matiushev ◽  
Anna A. Taranenko ◽  
Konstantin V. Vorob'ev
Keyword(s):  

Cybernetics ◽  
1981 ◽  
Vol 16 (4) ◽  
pp. 628-631
Author(s):  
L. A. Klygina
Keyword(s):  

2000 ◽  
Vol 9 (6) ◽  
pp. 489-511 ◽  
Author(s):  
JOSEP DÍAZ ◽  
MATHEW D. PENROSE ◽  
JORDI PETIT ◽  
MARÍA SERNA

This work deals with convergence theorems and bounds on the cost of several layout measures for lattice graphs, random lattice graphs and sparse random geometric graphs. Specifically, we consider the following problems: Minimum Linear Arrangement, Cutwidth, Sum Cut, Vertex Separation, Edge Bisection and Vertex Bisection. For full square lattices, we give optimal layouts for the problems still open. For arbitrary lattice graphs, we present best possible bounds disregarding a constant factor. We apply percolation theory to the study of lattice graphs in a probabilistic setting. In particular, we deal with the subcritical regime that this class of graphs exhibits and characterize the behaviour of several layout measures in this space of probability. We extend the results on random lattice graphs to random geometric graphs, which are graphs whose nodes are spread at random in the unit square and whose edges connect pairs of points which are within a given distance. We also characterize the behaviour of several layout measures on random geometric graphs in their subcritical regime. Our main results are convergence theorems that can be viewed as an analogue of the Beardwood, Halton and Hammersley theorem for the Euclidean TSP on random points in the unit square.


1998 ◽  
Vol 39 (5) ◽  
pp. 908-912 ◽  
Author(s):  
V. V. Kabanov
Keyword(s):  

2011 ◽  
Vol 24 (9) ◽  
pp. 1608-1613 ◽  
Author(s):  
Boram Park ◽  
Yoshio Sano
Keyword(s):  

2018 ◽  
Vol 338 ◽  
pp. 412-420
Author(s):  
Xing Feng ◽  
Lianzhu Zhang ◽  
Mingzu Zhang

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
Jia Huang

The Norton product is defined on each eigenspace of a distance regular graph by the orthogonal projection of the entry-wise product. The resulting algebra, known as the Norton algebra, is a commutative nonassociative algebra that is useful in group theory due to its interesting automorphism group. We provide a formula for the Norton product on each eigenspace of a Hamming graph using linear characters. We construct a large subgroup of automorphisms of the Norton algebra of a Hamming graph and completely describe the automorphism group in some cases. We also show that the Norton product on each eigenspace of a Hamming graph is as nonassociative as possible, except for some special cases in which it is either associative or equally as nonassociative as the so-called double minus operation previously studied by the author, Mickey, and Xu. Our results restrict to the hypercubes and extend to the halved and/or folded cubes, the bilinear forms graphs, and more generally, all Cayley graphs of finite abelian groups.


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