On the bandwidth of 3-dimensional Hamming graphs

Theoretical Computer Science(2008)

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摘要
This paper presents strategies for improving the known upper and lower bounds for the bandwidth of Hamming graphs (K"n)^d and [0,1]^d. Our labeling strategy lowers the upper bound on the bandwidth of the continuous Hamming graph, [0,1]^3, from .5 to .4497. A lower bound of .4439 on bw([0,1]^3) follows from known isoperimetric inequalities and a related dynamic program is conjectured to raise that lower bound to 4/9=.4444.... In particular, showing the power of our method, we prove that the bandwidth of K"6xK"6xK"6 is exactly 101.
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关键词
Combinatorial optimization,3-dimensional Hamming graph,continuous Hamming graph,lower bound,related dynamic program,combinatorial optimization,isoperimetric inequality,Hamming graph
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