Taylor, Keith F.2004-10-212013-01-041997-01-012013-01-041997-011997-01-01January 19http://hdl.handle.net/10388/etd-10212004-000606In this thesis, we systematically study the crossed product of a finite connected simplicial complex with a finite group action on it. And we also study surface $C\sp\*$-algebras, and crystal group $C\sp\*$-algebras.en-UStext