الفهرس 
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Abstract
The main objective of this thesis is to introduce the classes of Armendariz, rigid and *-rigid *-rings. These classes generalize the classes of Armendariz, rigid and *-rigid rings, respectively. Moreover, we introduce more generalizations for *-Armendariz *-rings; such as central *-Armendariz, weak *- Armendariz, *-weak *-Armendariz and quasi *-Armendariz. Finally, the classes of *-*-reversible and *-*-Armendariz *-rings, which generalizes that of rigid and *-rigid *-rings, are given.