# American Institute of Mathematical Sciences

February  2011, 5(1): 23-36. doi: 10.3934/amc.2011.5.23

## Construction of self-dual codes with an automorphism of order $p$

 1 Department of Mathematics, Yonsei University, 134 Shinchon-dong, Seodaemun-Gu, Seoul 120-749, South Korea, South Korea 2 Department of Mathematics, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemun-Gu, Seoul, 120-750, South Korea, South Korea

Received  April 2010 Revised  December 2010 Published  February 2011

We develop a construction method for finding self-dual codes with an automorphism of order $p$ with $c$ independent $p$-cycles. In more detail, we construct a self-dual code with an automorphism of type $p-(c,f+2)$ and length $n+2$ from a self-dual code with an automorphism of type $p-(c,f)$ and length $n$, where an automorphism of type $p-(c, f)$ is that of order $p$ with $c$ independent cycles and $f$ fixed points. Using this construction, we find three new inequivalent extremal self-dual $[54, 27, 10]$ codes with an automorphism of type $7-(7,5)$ and two new inequivalent extremal self-dual $[58, 29, 10]$ codes with an automorphism of of type $7-(8,2)$. We also obtain an extremal self-dual $[40, 20, 8]$ code with an automorphism of type $3-(10, 10)$, which is constructed from an extremal self-dual $[38, 19, 8]$ code of type $3-(10,8)$, and at least 482 inequivalent extremal self-dual $[58,29,10]$ codes with an automorphism of type $3-(18,4)$, which is constructed from an extremal self-dual $[54, 27, 10]$ code of type $3-(18,0);$ we note that the extremality is preserved.
Citation: Hyun Jin Kim, Heisook Lee, June Bok Lee, Yoonjin Lee. Construction of self-dual codes with an automorphism of order $p$. Advances in Mathematics of Communications, 2011, 5 (1) : 23-36. doi: 10.3934/amc.2011.5.23
##### References:
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show all references

##### References:
 [1] I. Bouyukliev and S. Bouyuklieva, Some new extremal self-dual codes with lengths $44, 50, 54,$ and $58$,, IEEE Trans. Inform. Theory, 44 (1998), 809. doi: 10.1109/18.661526. Google Scholar [2] S. Bouyuklieva, A method for constructing self-dual codes with an automorphism of order 2,, IEEE Trans. Inform. Theory, 46 (2000), 496. doi: 10.1109/18.825812. Google Scholar [3] S. Bouyuklieva and I. Bouyukliev, Extremal self-dual codes with an automorphism of order 2,, IEEE Trans. Inform. Theory, 44 (1998), 323. doi: 10.1109/18.651059. Google Scholar [4] S. Bouyuklieva and P. Östergård, New constructions of optimal self-dual binary codes of length $54$,, Des. Codes Crypt., 41 (2006), 101. doi: 10.1007/s10623-006-0018-2. Google Scholar [5] S. Bouyuklieva, R. Russeva and N. Yankov, On the structure of binary self-dual codes having an automorphism of order a square of an odd prime,, IEEE Trans. Inform. Theory, 51 (2005), 3678. doi: 10.1109/TIT.2005.855616. Google Scholar [6] J. H. Conway and N. J. A. Sloane, A new upper bound on the minimal distance of self-dual codes,, IEEE Trans. Inform. Theory, 36 (1991), 1319. doi: 10.1109/18.59931. Google Scholar [7] R. Dontcheva and M. Harada, Extremal self-dual codes of length 62 and related extremal self-dual codes,, IEEE Trans. Inform. Theory, 48 (2002), 2060. doi: 10.1109/TIT.2002.1013144. Google Scholar [8] R. Dontcheva and M. Harada, Some extremal self-dual codes with an automorphism of order 7,, Algebra Eng. Commun. Comput. (AAECC J.), 14 (2003), 75. Google Scholar [9] S. T. Dougherty, T. A. Gulliver and M. Harada, Extremal binary self-dual codes,, IEEE Trans. Inform. Theory, 43 (1997), 2036. doi: 10.1109/18.641574. Google Scholar [10] T. A. Gulliver, J.-L. Kim and Y. Lee, New MDS and near-MDS self-dual codes,, IEEE Trans. Inform. Theory, 54 (2008), 4354. doi: 10.1109/TIT.2008.928297. Google Scholar [11] M. Harada, T. A. Gulliver and H. Kaneta, Classification of extremal double-circulant self-dual codes of length up to 62,, Discrete Math., 188 (1998), 127. doi: 10.1016/S0012-365X(97)00250-1. Google Scholar [12] M. Harada and H. Kimura, On extremal self-dual codes,, Math. J. Okayama Univ., 37 (1995), 1. Google Scholar [13] W. C. Huffman, Automorphisms of codes with application to extremal doubly-even codes of length $48$,, IEEE Trans. Inform. Theory, 28 (1982), 511. doi: 10.1109/TIT.1982.1056499. Google Scholar [14] W. C. Huffman, The $[52,26,10]$ binary self-dual codes with an automorphism of order $7$,, Finite Fields Appl., 7 (2001), 341. doi: 10.1006/ffta.2000.0295. Google Scholar [15] J.-L. Kim, New extremal self-dual codes of length $36$, $38$, and $58$,, IEEE Trans. Inform. Theory, 47 (2001), 386. doi: 10.1109/18.904540. Google Scholar [16] J.-L. Kim and Y. Lee, Euclidean and Hermitian self-dual MDS codes over large finite fields,, J. Combin. Theory Ser. A, 105 (2004), 79. doi: 10.1016/j.jcta.2003.10.003. Google Scholar [17] V. Pless, A classification of self-orthogonal codes over $GF(2)$,, Discrete Math., 3 (1972), 209. doi: 10.1016/0012-365X(72)90034-9. Google Scholar [18] V. Pless, N. J. A. Sloane and H. N. Ward, Ternary codes of minimum weight 6 and the classification of the self-dual codes of length 20,, IEEE Trans. Inform. Theory, 26 (1980), 306. doi: 10.1109/TIT.1980.1056195. Google Scholar [19] H.-P. Tsai, Existence of certain extremal self-dual codes,, IEEE Trans. Inform. Theory, 38 (1992), 501. doi: 10.1109/18.119711. Google Scholar [20] H.-P. Tsai and Y. J. Jiang, Some new extremal self-dual $[58,29,10]$ codes,, IEEE Trans. Inform. Theory, 44 (1998), 813. doi: 10.1109/18.661527. Google Scholar [21] V. Y. Yorgov, Binary self-dual codes with automorphisms of an odd order,, Problems Inform. Trans., 19 (1983), 260. Google Scholar [22] V. Y. Yorgov, A method for constructing inequivalent self-dual codes with applications to length 56,, IEEE Trans. Inform. Theory, 33 (1987), 77. doi: 10.1109/TIT.1987.1057273. Google Scholar [23] S. Zhang and S. Li, Some new extremal self-dual codes with lengths $42, 44, 52,$ and $58$,, Discrete Math., 238 (2001), 147. doi: 10.1016/S0012-365X(00)00420-9. Google Scholar
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