Length | Data | Remarks |
---|---|---|

1-7 | ||

8 | ||

9-15 | ||

16 | Z4-16-I-all.tar.gz | Type I only |

17 | Z4-17-all.tar.gz | |

18 | Z4-18-all.tar.gz | |

19 |
Z4-19-all.tar.gz |

Data files are in Magma format.

- checking equivalence
- checking mass formula (for lengths up to 20)
- extracting codes from a lattice

- E. Bannai, S.T. Dougherty, M. Harada and M. Oura, Type II codes, even unimodular lattices, and invariant rings, IEEE Trans. Inform. Theory 45 (1999), 1194-1205.
- J.H. Conway and N.J.A. Sloane, Self-dual codes over the integers modulo 4, J. Combin. Theory Ser.A 62 (1993), 30-45.
- J. Fields, P. Gaborit, J.S. Leon and V. Pless, All self-dual Z_4 codes of length 15 or less are known, IEEE Trans. Inform. Theory 44 (1998), 311-322.
- P. Gaborit, Mass formulas for self-dual codes over Z_4 and F_q+uF_q rings, IEEE Trans. Inform. Theory 42 (1996), 1222-1228.
- M. Harada and A. Munemasa, On the classification of self-dual Z_k-codes, Cryptography and coding, 78-90, Lecture Notes in Comput. Sci., 5921, Springer, Berlin, 2009.
- V. Pless, J.S. Leon and J. Fields, All Z_4 codes of Type II and length 16 are known, J. Combin. Theory Ser.A 78 (1997), 32-50.
- E. Rains, Optimal self-dual codes over Z_4, Discrete Math. 203 (1999), 215-228.
- E. Rains and N.J.A. Sloane, Self-dual codes, in Handbook of Coding Theory, V.S. Pless and W.C. Huffman (Editors), Elsevier, Amsterdam 1998, pp. 177-294.

- Vera Pless

Indecomposable Z/(4) Codes (for codes of smaller lengths) - Markus Grassl

"Bounds on the minimum distance of linear codes"

http://www.codetables.de - Philippe Gaborit and Ayoub Otmani

"Tables of self-dual codes" - N.J.A. Sloane,

"A library of linear (and nonlinear) codes"

Created May 24, 2009 by Masaaki Harada and Akihiro Munemasa

Last modified May 1, 2013.