Results 71 to 80 of about 91,509 (288)

On commutative endomorphism rings [PDF]

Pacific Journal of Mathematics, 1970
This note deals with a finitely generated faithful module E over a commutative semi-prime noetherian ring R, with commutative endomorphism ring HomJ2(Er, E) = Ω(E). It is shown that E is identifiable to an ideal of R whenever Ω(E) lacks nilpotent elements; a class of examples with Ω(E) commutative but not semi-prime is discussed.
openaire   +2 more sources

Z-Polynomials and Ring Commutativity [PDF]

Mathematical Proceedings of the Royal Irish Academy, 2012
We characterise polynomials f with integer coefficients such that a ring with unity R is necessarily commutative if f(x) is central for all x Ɛ R. We also solve the corresponding problem without the assumption that the ring has a unity.
Buckley, Stephen M., McHale, D.
openaire   +2 more sources

Multiterminal High‐Voltage Direct Current Projects: A Comprehensive Assessment and Future Prospects

High Voltage, EarlyView.
ABSTRACT Multiterminal high‐voltage direct current (MT‐HVDC) systems are an important part of modern power systems, addressing the need for bulk power delivery and efficient renewable energy integration. This paper provides a comprehensive overview of recent advances in MT‐HVDC technology, including launched projects and ongoing initiatives.
Mohammad Hossein Mousavi, Hassan Moradi, Kumars Rouzbehi, Vijay K. Sood   +3 more
wiley   +1 more source

Double Constacyclic Codes over Two Finite Commutative Chain Rings [PDF]

, 2022
Yun Fan, Hualu Liu
openalex   +1 more source

S-almost perfect commutative rings [PDF]

Journal of Algebra, 2019
Given a multiplicative subset $S$ in a commutative ring $R$, we consider $S$-weakly cotorsion and $S$-strongly flat $R$-modules, and show that all $R$-modules have $S$-strongly flat covers if and only if all flat $R$-modules are $S$-strongly flat. These equivalent conditions hold if and only if the localization $R_S$ is a perfect ring and, for every ...
Silvana Bazzoni, Leonid Positselski
openaire   +4 more sources

Computerized dynamic assessment of seriational thinking modifiability: Effects of mediation on seriation and readiness for math among kindergarten and grade 1 children

British Journal of Educational Psychology, EarlyView.
Abstract Background and Aims A vast body of theory and research highlights the operation of seriation as a prerequisite to mathematical thinking in young children. However, there is limited evidence that seriation interventions improve early years mathematics.
David Tzuriel, Dikla Hanuka‐Levi
wiley   +1 more source

Fuzzy and Gradual Prime Ideals

Mathematics
There is a correspondence between equivalence classes of fuzzy ideals, on a commutative ring, and decreasing gradual ideals. In this paper, we explore how to construct a fuzzy ideal starting from any decreasing gradual ideal σ.
Pascual Jara, Salwa Mohamed
doaj   +1 more source

Ring homomorphisms on real Banach algebras

International Journal of Mathematics and Mathematical Sciences, 2003
Let B be a strictly real commutative real Banach algebra with the carrier space ΦB. If A is a commutative real Banach algebra, then we give a representation of a ring homomorphism ρ:A→B, which needs not be linear nor continuous.
Takeshi Miura, Sin-Ei Takahasi
doaj   +1 more source

Ideal Dasar Prima Dalam Aljabar Atas Suatu Ring Komutatif

Jurnal Fourier, 2018
Definisi ideal dasar dan ideal bebas dalam aljabar bebas atas ring komutatif dengan elemen satuan adalah ekuivalen. Namun, ideal dasar dalam suatu aljabar tak bebas belum tentu merupakan ideal bebas, sementara ideal bebas pasti ideal dasar.
Khurul Wardati
doaj   +1 more source

Non-commutative Regular Rings

Journal of Algebra, 2001
In a previous article, the author introduced a noncommutative concept of Cohen-Macaulay ring based on invertible ideals rather than invertible elements [J. Algebra 236, No. 2, 522-548 (2001; Zbl 0982.16008)]; here he narrows the focus to a corresponding notion of regular (semi)local ring.
openaire   +1 more source