2 papers
math.FA2020
Embeddability of real and positive operators
Tanja Eisner, Agnes Radl
Embedding discrete Markov chains into continuous ones is a famous open problem in probability theory with many applications. Inspired by recent progress, we study the closely relat…
math.FA2015
A semigroup approach to the numerical range of operators on Banach spaces
Martin Adler, Waed Dada, Agnes Radl
We introduce the numerical spectrum of an (unbounded) linear operator on a Banach space and study its properties. Our definition is closely relat…