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arXiv 1306.5674math.FA
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半群的强稳定性的鲁棒性

Robustness of strong stability of semigroups

Lassi Paunonen

摘要:

本文研究了希尔伯特空间上强连续半群的强稳定性保持性。特别地,我们研究了半群的生成元在虚轴上有有限个谱点且其预解算子的范数在这些点附近多项式有界的情形。刻画了一类保持半群强稳定性的有限秩扰动。此外,我们改进了最近关于半群在生成元有限秩扰动下保持多项式稳定性的结果。最后给出了一个保乘法半群强稳定性的例子。

英文摘要:

In this paper we study the preservation of strong stability of strongly continuous semigroups on Hilbert spaces. In particular, we study a situation where the generator of the semigroup has a finite number of spectral points on the imaginary axis and the norm of its resolvent operator is polynomially bounded near these points. We characterize classes of finite rank perturbations preserving the strong stability of the semigroup. In addition, we improve recent results on preservation of polynomial stability of a semigroup under finite rank perturbations of its generator. Theoretic results are illustrated with an example where we consider the preservation of the strong stability of a multiplication semigroup.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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