Explicit Bounds for the Pseudospectra of Various Classes of Matrices and Operators

Feixue Gong, Olivia Meyerson, Jeremy Meza +2

We study the $\epsilon$-pseudospectra ${\sigma }_{\epsilon }(A)$ of square matrices $A\in {\mathbb{C}}^{N\times N}$. We give a complete characterization of the $\epsilon$-pseudospectrum of any $2\times 2$ matrix…