Abstract: In this paper, some estimates of ‖A^-1‖_∞ based on our previous paper are given, The relation between these estimates and Varga's estimate in [2] is illustrated. For several interesting matrices the norm ‖A^-1‖_∞ are found by use of our method, These examples show that our method is preferable.

Key words: norm of A^-1, diagonal dominance, equidiagonal dominance