Publication Date

5-2016

Date of Final Oral Examination (Defense)

3-16-2016

Type of Culminating Activity

Thesis

Degree Title

Master of Science in Mathematics

Department

Mathematics

Major Advisor

Samuel Coskey, Ph.D.

Advisor

Marion Scheepers, Ph.D.

Advisor

Zachariah Teitler, Ph.D.

Abstract

In this thesis we identify the complexity of the conjugacy problem of automorphisms of regular trees. We expand on the results of Kechris, Louveau, and Friedman on the complexities of the isomorphism problem of classes of countable trees. We see in nearly all cases that the complexity of isomorphism of subtrees of a given regular countable tree is the same as the complexity of conjugacy of automorphisms of the same tree, though we present an example for which this does not hold.

Share

COinS