The MAGMA algebra system I: the user language
Journal of Symbolic Computation - Special issue on computational algebra and number theory: proceedings of the first MAGMA conference
Word Processing in Groups
Combinatorics of normal sequences of braids
Journal of Combinatorial Theory Series A
Journal of Combinatorial Theory Series A
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We derive a recurrence relation for the number of simple vertex-labelled bipartite graphs with given degrees of the vertices and use this result to obtain a new method for computing the growth function of the Artin monoid of type A"n"-"1 with respect to the simple elements (permutation braids) as generators. Instead of matrices of size 2^n^-^1x2^n^-^1, we use matrices of size p(n)xp(n), where p(n) is the number of partitions of n.