摘要
作者与Ｒ．Ａ．Ｂｒｕａｌｄｉ教授提出了不可约矩阵弱指数的概念（见［Ｂｒｕｌｉｕ２］）．本文给出了弱指数（弱本原指数，弱完全不可分解指数，弱Ｈａｌｌ指数）的上确界以及它们的指数集．
In this paper we obtain exact upper bounds of weak exponents (weak primi-tive exponent, weak fully indecomposable exponent, weak Hall exponent) of irreduciblematrices and determine their exponent sets.
