Geodesic
Double circulant codes over $\bbfZ\sb 4$ and even unimodular lattices
Journal of Algebraic Combinatorics, Tome 6 (1997) no. 2, pp. 119-131.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: With the help of some new results about weight enumerators of self-dual codes over $\mathbb Z _{4}$ mathbbZ_4 we investigate a class of double circulant codes over $\mathbb Z _{4}$ mathbbZ_4 , one of which leads to an extremal even unimodular 40-dimensional lattice. It is conjectured that there should be $\mathbb Z _{4}$ mathbbZ_4 - Leech lattice - invariant theory Fulltext Preview $###$
Keywords: quarterly code, unimodular lattice, Z4, Leech lattice, invariant theory 
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     author = {Calderbank, A.R. and Sloane, N.J.A.},
     title = {Double circulant codes over $\bbfZ\sb 4$ and even unimodular lattices},
     journal = {Journal of Algebraic Combinatorics},
     pages = {119--131},
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     year = {1997},
     language = {en},
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Calderbank, A.R.; Sloane, N.J.A. Double circulant codes over $\bbfZ\sb 4$ and even unimodular lattices. Journal of Algebraic Combinatorics, Tome 6 (1997) no. 2, pp. 119-131. http://geodesic.mathdoc.fr/item/JAC_1997__6_2_a4/