Computer Science – Discrete Mathematics
Scientific paper
2007-08-27
Computer Science
Discrete Mathematics
10 pages
Scientific paper
The Hales numbered $n$-dimensional hypercube and the corresponding adjacency matrix exhibit interesting recursive structures in $n$. These structures lead to a very simple proof of the well-known bandwidth formula for hypercube, whose proof was thought to be surprisingly difficult. A related problem called hypercube antibandwidth, for which Harper proposed an algorithm, is also reexamined in the light of the above recursive structures, and a close form solution is found.
Wang Xiaohan
Wu Xiaolin
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