标题： 从谱的角度看线性差分系统的几乎可约性 显示英文标题

标题： Almost reducibility of linear difference systems from a spectral point of view

摘要： 我们证明，在某些条件下，一个线性非自治差分系统可以被Bylov几乎约化为一个对角线系统，其项包含在原系统的Sacker和Sell谱中。 我们还提供了一个由Pötzche最近引入的对角显著系统的例子。 这个例子在我们结果的证明中起着关键作用。 显示英文摘要

摘要： We prove that, under some conditions, a linear nonautonomous difference system is Bylov's almost reducible to a diagonal one whose terms are contained in the Sacker and Sell spectrum of the original system. We also provide an example of the concept of diagonally significant system, recently introduced by P\"otzche. This example plays an essential role in the demonstration of our results.