Presentation 2000/4/26
On the factorization of the product graph of a hypercube and a path
Yosuke Kikuchi, Hiroyuki Odaka, Yukio Shibata,
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Abstract(in English) The skew product of graphs is introduced in Y.Shibata and Y.Kikuchi, Graph products based on the distance in graphs, IEICE Trans. Fundamentals, E83-A, 3(2000) 459-464. We introduce a new class of graphs using the skew product. This class is the skew product of a hypercube and a path, where the length of the path is greater than the dimension of the hypercube by one. We show that if n is odd, then the skew product of the n dimensional hypercube and the path of length n+1 is isomorphically factorized by the n-dimensional butterfly. We introduce the swallowtail graph and the twisted swallowtail graph that play an important role in the proof of the above statement. Moreover, we show that if n is even, then the skew product of the n dimensional hypercube and the path of length n+1 is decomposed by n/2 n-dimensional butterflies and 2^n paths of length n+1.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) hypercube / butterfly / skew product / isomorphic factorization
Paper # COMP2000-2
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Conference Information
Committee COMP
Conference Date 2000/4/26(1days)
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Registration To Theoretical Foundations of Computing (COMP)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) On the factorization of the product graph of a hypercube and a path
Sub Title (in English)
Keyword(1) hypercube
Keyword(2) butterfly
Keyword(3) skew product
Keyword(4) isomorphic factorization
1st Author's Name Yosuke Kikuchi
1st Author's Affiliation Department of Computer Science, Gunma University()
2nd Author's Name Hiroyuki Odaka
2nd Author's Affiliation Department of Computer Science, Gunma University
3rd Author's Name Yukio Shibata
3rd Author's Affiliation Department of Computer Science, Gunma University
Date 2000/4/26
Paper # COMP2000-2
Volume (vol) vol.100
Number (no) 25
Page pp.pp.-
#Pages 8
Date of Issue