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# Operator Algebras Seminar

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Fri., Oct. 23, 2015 11:00 a.m.
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Location: CK 185
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**Speaker:**Samir RaouafiOn the generalization of the Kreiss Matrix Theorem**Title:**The theory of pseudospectra is a new tool for studying matrices and linear operators. The traditional tool is the spectrum. It reveals information on the behavior of normal matrices or operators. However, it is less informative as the matrix or the operator is non-normal. Pseudospectra have nevertheless proved to be a powerful tool to study them. In this second lecture, we will discuss the Kreiss Matrix Theorem and its generalization in the space of analytic functions on the unit disc.**Abstract:**