在这篇文章中,作者首先引入弱闭Alg(N)-模u上的半范数iN^-^~,2N^+^~(任意N∈N),并且利用这些半范数刻画“的有限分划子模;进而,作为该刻画的一个应用,文中给出有限分划子模的距离公式.
In this paper, the authors first introduce semi-norms iN^-^~,2N^+^~(arbitanyNE∈N) on a weakly closed Alg(N)-module μ and use them to characterize the finite-partition sub-module of μ; Furthermore, as an application of the characterization, the authors give the distance formula for the finitepartition sub-module.