## Theses and Dissertations

#### Abstract

Let G be a group. A weak Cayley table isomorphism $\phi$: G $\rightarrow$ G is a bijection satisfying two conditions: (i) $phi$ sends conjugacy classes to conjugacy classes; and (ii) $\phi$(g1)$\phi$(g2) is conjugate to $\phi$(g1g2) for all g1, g2 in G. The set of all such mappings forms a group W(G) under composition. We study W(G) for fifty-six of the two hundred nineteen three-dimensional crystallographic groups G as well as some other groups. These fifty-six groups are related to our previous work on wallpaper groups.

PhD

#### College and Department

Physical and Mathematical Sciences; Mathematics

2021-12-03

Dissertation

#### Handle

http://hdl.lib.byu.edu/1877/etd11976

#### Keywords

crystallographic groups, automorphisms, weak Cayley table isomorphisms

english

COinS