"Andre-Quillen Homology and Special Classes of Ring Homomorphisms" by Hossein Faridian

Date of Award

12-2024

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Mathematical Sciences

Committee Chair/Advisor

Dr. Jim Coykendall

Committee Member

Dr. Srikanth Iyengar

Committee Member

Dr. Svetlana Poznanovikj

Committee Member

Dr. Michael Burr

Committee Member

Dr. Hui Xue

Abstract

This thesis is comprised of three chapters. The first chapter deals with a purely algebraic proof of a deep result of Quillen stating that the category of simplicial commutative algebras over a commutative ring is a model category. The central focus of our approach is on the study of shuffle product of connective chain complexes that provides a bridge to translate the constructions in the simplicial algebra world to the chain complex world.

The second chapter delves into Quillen's fundamental spectral sequences that relate Andre-Quillen homology and cohomology to Tor and Ext functors. Our comprehensive treatment develops and streamlines the requisite background constructions to provide a suitable framework in order to establish complete proofs.

The third chapter studies certain special classes of ring homomorphisms, the so-called complete intersection maps and exceptional complete intersection maps. Some research has been conducted to characterize or detect the exceptional property. We investigate this property further and discover new conditions to detect it.

Included in

Algebra Commons

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