Codes from the incidence matrices and line graphs of Hamming graphs H^k(n,2) for k \geq 2

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May 2011, 5(2): 373-394. doi: 10.3934/amc.2011.5.373

Codes from the incidence matrices and line graphs of Hamming graphs $H^k(n,2)$ for $k \geq 2$

Jennifer D. Key ^1, , Washiela Fish ^1, and Eric Mwambene ^1,

1.	Department of Mathematics and Applied Mathematics, University of the Western Cape, 7535 Bellville, South Africa, South Africa, South Africa

Received May 2010 Revised June 2010 Published May 2011

Abstract
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We examine the $p$-ary codes, for any prime $p$, that can be obtained from incidence matrices and line graphs of the Hamming graphs, $H^k(n,m)$, for $k \geq 2$. For $m=2$, we obtain the main parameters of the codes from the incidence matrices, including the minimum weight and the nature of the minimum words. We show that all the codes can be used for full permutation decoding.

Keywords: Hamming graphs, codes, permutation decoding..

Mathematics Subject Classification: Primary: 05C45, 94B05; Secondary: 05B0.

Citation: Jennifer D. Key, Washiela Fish, Eric Mwambene. Codes from the incidence matrices and line graphs of Hamming graphs $H^k(n,2)$ for $k \geq 2$. Advances in Mathematics of Communications, 2011, 5 (2) : 373-394. doi: 10.3934/amc.2011.5.373

References:

[1]	E. F. Assmus, Jr and J. D. Key, "Designs and Their Codes,'', Cambridge University Press, (1992).
[2]	W. Bosma, J. Cannon and C. Playoust, The Magma algebra system I: The user language,, J. Symb. Comp., 24 (1997), 235. doi: 10.1006/jsco.1996.0125.
[3]	A. E. Brouwer, A. M. Cohen and A. Neumaier, Distance-Regular Graphs,, in, (1989).
[4]	J. Cannon, A. Steel and G. White, Linear codes over finite fields,, in, (2006), 3951.
[5]	W. Fish, "Codes from Uniform Subset Graphs and Cyclic Products,'', Ph.D thesis, (2007).
[6]	W. Fish, J. D. Key and E. Mwambene, Codes, designs and groups from the Hamming graphs,, J. Combin. Inform. System Sci., 34 (2009), 169.
[7]	W. Fish, J. D. Key and E. Mwambene, Graphs, designs and codes related to the $n$-cube,, Discrete Math., 309 (2009), 3255. doi: 10.1016/j.disc.2008.09.024.
[8]	W. Fish, J. D. Key and E. Mwambene, Binary codes of line graphs from the $n$-cube,, J. Symb. Comput., 45 (2010), 800. doi: 10.1016/j.jsc.2010.03.012.
[9]	W. Fish, J. D. Key and E. Mwambene, Codes from the incidence matrices and line graphs of Hamming graphs,, Discrete Math., 310 (2010), 1884. doi: 10.1016/j.disc.2010.02.010.
[10]	D. M. Gordon, Minimal permutation sets for decoding the binary Golay codes,, IEEE Trans. Inform. Theory, 28 (1982), 541. doi: 10.1109/TIT.1982.1056504.
[11]	W. C. Huffman, Codes and groups,, in, (1998), 1345.
[12]	J. D. Key, T. P. McDonough and V. C. Mavron, Partial permutation decoding for codes from finite planes,, European J. Combin., 26 (2005), 665. doi: 10.1016/j.ejc.2004.04.007.
[13]	J. D. Key, T. P. McDonough and V. C. Mavron, Information sets and partial permutation decoding for codes from finite geometries,, Finite Fields Appl., 12 (2006), 232. doi: 10.1016/j.ffa.2005.05.007.
[14]	J. D. Key, J. Moori and B. G. Rodrigues, Codes associated with triangular graphs, and permutation decoding,, Int. J. Inform. Coding Theory, 1 (2010), 334. doi: 10.1504/IJICOT.2010.032547.
[15]	J. D. Key and B. G. Rodrigues, Codes from lattice and related graphs, and permutation decoding,, Discrete Appl. Math., 158 (2010), 1807. doi: 10.1016/j.dam.2010.07.003.
[16]	J. D. Key and B. G. Rodrigues, Codes from incidence matrices of strongly regular graphs,, in preparation., ().
[17]	J. D. Key and P. Seneviratne, Permutation decoding for binary self-dual codes from the graph $Q_n$ where $n$ is even,, in, (2007), 152.
[18]	H.-J. Kroll and R. Vincenti, PD-sets related to the codes of some classical varieties,, Discrete Math., 301 (2005), 89. doi: 10.1016/j.disc.2004.11.020.
[19]	J. H. van Lint and R. M. Wilson, "A Course in Combinatorics,'', Cambridge University Press, (1992).
[20]	F. J. MacWilliams, Permutation decoding of systematic codes,, Bell System Tech. J., 43 (1964), 485.
[21]	F. J. MacWilliams and N. J. A. Sloane, "The Theory of Error-Correcting Codes,'', North-Holland, (1983).
[22]	R. Peeters., On the $p$-ranks of the adjacency matrices of distance-regular graphs,, J. Algebraic Combin., 15 (2002), 127. doi: 10.1023/A:1013842904024.
[23]	J. Schönheim, On coverings,, Pacific J. Math., 14 (1964), 1405.
[24]	H. Whitney, Congruent graphs and the connectivity of graphs,, Amer. J. Math., 54 (1932), 154. doi: 10.2307/2371086.

show all references

References:

[1]	E. F. Assmus, Jr and J. D. Key, "Designs and Their Codes,'', Cambridge University Press, (1992).
[2]	W. Bosma, J. Cannon and C. Playoust, The Magma algebra system I: The user language,, J. Symb. Comp., 24 (1997), 235. doi: 10.1006/jsco.1996.0125.
[3]	A. E. Brouwer, A. M. Cohen and A. Neumaier, Distance-Regular Graphs,, in, (1989).
[4]	J. Cannon, A. Steel and G. White, Linear codes over finite fields,, in, (2006), 3951.
[5]	W. Fish, "Codes from Uniform Subset Graphs and Cyclic Products,'', Ph.D thesis, (2007).
[6]	W. Fish, J. D. Key and E. Mwambene, Codes, designs and groups from the Hamming graphs,, J. Combin. Inform. System Sci., 34 (2009), 169.
[7]	W. Fish, J. D. Key and E. Mwambene, Graphs, designs and codes related to the $n$-cube,, Discrete Math., 309 (2009), 3255. doi: 10.1016/j.disc.2008.09.024.
[8]	W. Fish, J. D. Key and E. Mwambene, Binary codes of line graphs from the $n$-cube,, J. Symb. Comput., 45 (2010), 800. doi: 10.1016/j.jsc.2010.03.012.
[9]	W. Fish, J. D. Key and E. Mwambene, Codes from the incidence matrices and line graphs of Hamming graphs,, Discrete Math., 310 (2010), 1884. doi: 10.1016/j.disc.2010.02.010.
[10]	D. M. Gordon, Minimal permutation sets for decoding the binary Golay codes,, IEEE Trans. Inform. Theory, 28 (1982), 541. doi: 10.1109/TIT.1982.1056504.
[11]	W. C. Huffman, Codes and groups,, in, (1998), 1345.
[12]	J. D. Key, T. P. McDonough and V. C. Mavron, Partial permutation decoding for codes from finite planes,, European J. Combin., 26 (2005), 665. doi: 10.1016/j.ejc.2004.04.007.
[13]	J. D. Key, T. P. McDonough and V. C. Mavron, Information sets and partial permutation decoding for codes from finite geometries,, Finite Fields Appl., 12 (2006), 232. doi: 10.1016/j.ffa.2005.05.007.
[14]	J. D. Key, J. Moori and B. G. Rodrigues, Codes associated with triangular graphs, and permutation decoding,, Int. J. Inform. Coding Theory, 1 (2010), 334. doi: 10.1504/IJICOT.2010.032547.
[15]	J. D. Key and B. G. Rodrigues, Codes from lattice and related graphs, and permutation decoding,, Discrete Appl. Math., 158 (2010), 1807. doi: 10.1016/j.dam.2010.07.003.
[16]	J. D. Key and B. G. Rodrigues, Codes from incidence matrices of strongly regular graphs,, in preparation., ().
[17]	J. D. Key and P. Seneviratne, Permutation decoding for binary self-dual codes from the graph $Q_n$ where $n$ is even,, in, (2007), 152.
[18]	H.-J. Kroll and R. Vincenti, PD-sets related to the codes of some classical varieties,, Discrete Math., 301 (2005), 89. doi: 10.1016/j.disc.2004.11.020.
[19]	J. H. van Lint and R. M. Wilson, "A Course in Combinatorics,'', Cambridge University Press, (1992).
[20]	F. J. MacWilliams, Permutation decoding of systematic codes,, Bell System Tech. J., 43 (1964), 485.
[21]	F. J. MacWilliams and N. J. A. Sloane, "The Theory of Error-Correcting Codes,'', North-Holland, (1983).
[22]	R. Peeters., On the $p$-ranks of the adjacency matrices of distance-regular graphs,, J. Algebraic Combin., 15 (2002), 127. doi: 10.1023/A:1013842904024.
[23]	J. Schönheim, On coverings,, Pacific J. Math., 14 (1964), 1405.
[24]	H. Whitney, Congruent graphs and the connectivity of graphs,, Amer. J. Math., 54 (1932), 154. doi: 10.2307/2371086.

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