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Universal Branched Coverings
In this paper, the study of k-fold branched coverings for which the branch set is a stratified set is considered. First of all, the existence of universal k-fold branched coverings over CW-complexes with stratified branch set is proved using Brown's Representability Theorem. Next, an explicit construction of universal k-fold branched coverings over manifolds is given. Finally, some homotopy and homology groups are computed for some specific examples of Universal k-fold branched coverings.
Date:
May 1993
Creator:
Tejada, Débora
System:
The UNT Digital Library
π-regular Rings
The dissertation focuses on the structure of π-regular (regular) rings.
Date:
May 1993
Creator:
Badawi, Ayman R.
System:
The UNT Digital Library