Properties and computations of matrix pseudospectra

@article{Shen2005PropertiesAC,
  title={Properties and computations of matrix pseudospectra},
  author={Yuming Shen and Jinxi Zhao and Hongjun Fan},
  journal={Applied Mathematics and Computation},
  year={2005},
  volume={161},
  pages={385-393}
}
Pseudospectra were introduced as early as 1975 and became popular tool during the 1990s.In this paper, we give a new definition of pseudospectra by using QR decomposition. Some properties of pseduospectra are explored and an algorithm for the computation of pseduospectra is given. 

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Lloyd N. TrefethenCONTENTS
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Computation of pesudospectra

L. N. Trefethen
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