Multiplicative equations over commuting matrices
Multiplicative equations over commuting matrices
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交换矩阵上的乘法方程
DOI:
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发表时间:
1996
期刊:
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通讯作者:
E. Luks
中科院分区:
文献类型:
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作者:
L. Babai;R. Beals;Jin;G. Ivanyos;E. Luks
We consider the solvability of the equation and generalizations, where the A{sub i} and B are given commuting matrices over an algebraic number field F. In the semigroup membership problem, the variables x{sub i} are constrained to be nonnegative integers. While this problem is NP-complete for variable k, we give a polynomial time algorithm if k is fixed. In the group membership problem, the matrices are assumed to be invertible, and the variables x{sub i} may take on negative values. In this case we give a polynomial time algorithm for variable k and give an explicit description of the set of all solutions (as an affine lattice). The special case of 1 x 1 matrices was recently solved by Guoqiang Ge; we heavily rely on his results.