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Journal of Algebra
Article
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Journal of Algebra
Article . 1991
License: Elsevier Non-Commercial
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Journal of Algebra
Article . 1991 . Peer-reviewed
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Addition of algebra endomorphisms

Authors: James R. Clay;

Addition of algebra endomorphisms

Abstract

``In this work, we show that the old world of ring theory strongly bids its admirers and serious students to take a rigorous adventure into the world of near-rings. As a result, one sees that the ideas and structure of each world provide insight and influence upon the other.'' The author achieves this goal in a provocative article in which the path stems from ring theory rather than group theory. Let \(A(R)\) denote the category whose objects are the commutative \(R\)-algebras with identity and \(\text{Hom}_ R(A,B)\) denote the identity preserving \(R\)-algebra homomorphisms for the \(R\)-algebras \(A\) and \(B\). The goal is to show that for `special' \(R\)-algebras \(F\) of \(A(R)\), it is possible to define an additive operation + on \(\text{Hom}_ R(F,A)\) that leads to a near-ring \((\text{Hom}_ R(F,F),+,\circ)\). The additive operations that evolve are natural generalizations of the addition of homomorphisms of \(R\)-modules. Several types of these `special' \(R\)-algebras are introduced and then combined to obtain additional `special' \(R\)-algebras. Among these are the \(R\)-algebras of polynomials and Laurent polynomials, and the group algebra of an abelian group. These are the cogroup objects in the category \(A(R)\). In closing, the author highlights this unification.

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Keywords

Laurent polynomials, Near-rings, cogroup objects, Algebra and Number Theory, near-rings, category, \(R\)-algebra homomorphisms, addition of homomorphisms of \(R\)-modules, Associative rings of functions, subdirect products, sheaves of rings

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
hybrid