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Algorithms for the minimum weight of linear codes

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  • We outline the algorithm for computing the minimum weight of a linear code over a finite field that was invented by A.~Brouwer and later extended by K.-H. Zimmermann. We show that matroid partitioning algorithms can be used to efficiently find a favourable (and sometimes best possible) sequence of information sets on which the Brouwer-Zimmermann algorithm operates. We present a new algorithm for computing the minimum weight of a linear code. We use a large set of codes to compare our new algorithm with the Brouwer-Zimmermann algorithm. We find that for about one third of codes in this sample set, our algorithm requires to generate fewer codewords than the Brouwer-Zimmermann algorithm.
    Mathematics Subject Classification: Primary: 94B05; Secondary: 05B35.


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