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Uniform Exponential Stability of Perturbed Semigroups: The Dyson–Phillips Formula Versus Gil’s Approach Via Commutators
Results in Mathematics ( IF 1.1 ) Pub Date : 2021-02-14 , DOI: 10.1007/s00025-021-01353-1
Adam Gregosiewicz

We discuss the uniform exponential stability of strongly continuous semigroups generated by operators of the form \( A+B \), where B is a bounded perturbation of a generator A. We compare two approaches to the problem: via the Dyson–Phillips formula and via the size of the norm of the commutator of A and B- the method recently developed by M. Gil’. We show that quite often the first approach is more powerful than the second one and, more importantly, easier to use.



中文翻译:

扰动半群的一致指数稳定性:戴森-菲利普斯公式与吉尔通过换向器的方法

我们讨论了由\(A + B \)形式的算子生成的强连续半群的一致指数稳定性,其中B是生成器A的有界扰动。我们比较了解决该问题的两种方法:通过戴森-菲利普斯公式以及通过AB换向器的范数的大小-M. Gil'最近开发的方法。我们表明,第一种方法通常比第二种方法更强大,更重要的是更易于使用。

更新日期:2021-02-15
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