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On the Number of Factorizations of Polynomials over Finite Fields

机译:有限域上多项式的因式分解数

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Motivated by coding applications, two enumeration problems are considered: the number of distinct divisors of a degree-m polynomial over $mathbb{F} = GF(q)$, and the number of ways a polynomial can be written as a product of two polynomials of degree at most n over $mathbb{F}$. For the two problems, bounds are obtained on the maximum number of factorizations, and a characterization is presented for polynomials attaining that maximum. Finally, expressions are presented for the average and the variance of the number of factorizations, for any given m (resp., n).
机译:出于编码应用的考虑,考虑了两个枚举问题:$ \ mathbb {F} = GF(q)$的次数为m的多项式的不同除数的数量,以及多项式可写为的乘积的方式的数量。 $ \ mathbb {F} $上最多为n的两个次数的多项式。对于这两个问题,获得最大分解因子的界限,并给出了达到该最大值的多项式的特征。最后,对于任何给定的m(resp。,n),给出平均化和分解因子数量方差的表达式。

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