Essential Spectrum and Fredholm Index for Certain Composition Operators
AbstractWe investigate a composition operator on $H^\infty(U)$, $U$ a subdomain of the open unit disk, for which the essential resolvent has infinitely many components, and for which the Fredholm index of the resolvent operator attains all nonnegative integer values.
How to Cite
Yakes, C. J. (2016). Essential Spectrum and Fredholm Index for Certain Composition Operators. MATHEMATICA SCANDINAVICA, 118(1), 152-160. https://doi.org/10.7146/math.scand.a-23302