该文讨论了单位圆盘上解析函数的加权代数ap中的闭理想问题，并且利用加权系给出了一个闭理想成为AP中的补子空间的判断准则。

In this paper, we deal with the closed ideals in the weighted algebras of analytic functions on the unit disc, and give a criterion to decide whether a closed ideal is complemented subspace in ap.

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本文研究非线性时滞大系统的稳定性问题，通过微分不等式分析，建立起一些简洁、实用的稳定性代数充分准则。

In this paper, we study the stability of nonlinear large scale systems with time lag. Some simple stability criterion are obtained.

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