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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Spectra of Composition Operators on the Unit Ball in Two Complex Variables

Michael R Pilla (8882636) 15 June 2020 (has links)
Let <i>φ</i> be a self-map of <b>B</b><sub>2</sub>, the unit ball in <b>C</b><sup>2</sup>. We investigate the equation <i>C<sub>φ</sub>f</i>=<i>λf</i> where we define <i>C<sub>φ</sub>f </i>: -<i>f◦φ</i>, with <i>f a</i> function in the Drury Arves on Space. After imposing conditions to keep <i>C<sub>φ</sub></i> bounded and well-behaved, we solve the equation <i>C<sub>φ</sub>f - λf </i>and determine the spectrum <i>σ</i>(<i>C<sub>φ</sub></i>) in the case where there is no interior fixed point and boundary fixed point without multiplicity. We then investigate the existence of one-parameter semigroups for such maps and discuss some generalizations.

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