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zbMATH Open
Article . 1994
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Proceedings of the American Mathematical Society
Article . 1994 . Peer-reviewed
Data sources: Crossref
Proceedings of the American Mathematical Society
Article . 1994 . Peer-reviewed
Data sources: Crossref
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Polynomial Rings Over Goldie-Kerr Commutative Rings

Polynomial rings over Goldie-Kerr commutative rings
Authors: Faith, Carl;

Polynomial Rings Over Goldie-Kerr Commutative Rings

Abstract

All rings in this paper are commutative, and acc ⁡ ⊥ \operatorname {acc} \bot (resp., acc ⊕ \operatorname {acc} \, \oplus ) denotes the acc on annihilators (resp., on direct sums of ideals). Any subring of an acc ⁡ ⊥ \operatorname {acc} \bot ring, e.g., of a Noetherian ring, is an acc ⁡ ⊥ \operatorname {acc} \bot ring. Together, acc ⁡ ⊥ \operatorname {acc} \bot and acc ⊕ \operatorname {acc} \, \oplus constitute the requirement for a ring to be a Goldie ring. Moreover, a ring R R is Goldie iff its classical quotient ring Q Q is Goldie. A ring R R is a Kerr ring (the appellation is for J. Kerr, who in 1990 constructed the first Goldie rings not Kerr) iff the polynomial ring R [ x ] R[x] has acc ⁡ ⊥ \operatorname {acc} \bot (in which case R R must have acc ⁡ ⊥ \operatorname {acc} \bot ). By the Hilbert Basis theorem, if S S is a Noetherian ring, then so is S [ x ] S[x] ; hence, any subring R R of a Noetherian ring is Kerr. In this note, using results of Levitzki, Herstein, Small, and the author, we show that any Goldie ring R R such that Q = Q c ( R ) Q = {Q_c}(R) has nil Jacobson radical (equivalently, the nil radical of R R is an intersection of associated prime ideals) is Kerr in a very strong sense: Q Q is Artinian and, hence, Noetherian (Theorems 1.1 and 2.2). As a corollary we prove that any Goldie ring A A that is algebraic over a field k k is Artinian, and, hence, any order R R in A A is a Kerr ring (Theorem 2.5 and Corollary 2.6). The same is true of any algebra A A over a field k k of cardinality exceeding the dimension of A A (Corollary 2.7). Other Kerr rings are: reduced acc ⁡ ⊥ \operatorname {acc} \bot rings and valuation rings with acc ⁡ ⊥ \operatorname {acc} \bot (see 3.3 and 3.4).

Keywords

Polynomial rings and ideals; rings of integer-valued polynomials, Goldie quotient ring, Kerr ring, valuation ring, Chain conditions on annihilators and summands: Goldie-type conditions, Commutative Artinian rings and modules, finite-dimensional algebras, Artinianness, Commutative Noetherian rings and modules

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selected citations
These citations are derived from selected sources.
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!
4
Average
Average
Average
bronze