Results 21 to 30 of about 664,134 (330)

The Graph of Annihilating Ideals [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2018
Let R be a commutative ring with identity and AG(R) be the set of ideals with      non-zero annihilators. The annihilating ideal graph AG(R) is a graph of vertex set             AG (R){(0)}  and two distinct ideal vertices I  and J are adjacent if and ...
Nazar Shuker, Fryad Abdulqadir
doaj   +1 more source

On Almost Weakly np – injective Rings [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2018
The ring R is called right almost weakly np –injective, if for any , there exists a positive integer n and a left ideal  of R such that . In this paper, we give some characterization and properties of almost weakly np – injective rings.
Raida Mahmood, Amaar Ghaze
doaj   +1 more source

Dermatoscopic Patterns in Childhood Vitiligo and Their Association With Reflectance Confocal Microscopy Findings

open access: yesDermatology Practical & Conceptual, 2023
Introduction: The diagnosis of vitiligo is mainly based on clinical findings. However, dermoscopy or reflectance confocal microscopy (RCM) could be useful for assessing its progression (stability, pigmentation, or depigmentation).
Juan Alberto Godínez-Chaparro   +3 more
doaj   +1 more source

Row reduced representations of behaviors over finite rings [PDF]

open access: yes, 2007
Row reduced representations of behaviors over fields posses a number of useful properties. Perhaps the most important feature is the predictable degree property. This property allows a finite parametrization of the module generated by the rows of the row
Kuijper, Margreta   +2 more
core   +3 more sources

On Generalized m-flat Modules [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2013
Let I be a right (left) ideal of a ring R. Then R/I is a right (left) generalized m – flat modules (GmF – module) if and only if for each , there exist  and a fixed positive integer m such that .
Zubayda Ibraheem, Maha Khalaf
doaj   +1 more source

Relative Stability and Local Curvature Analysis in Carbon Nanotori [PDF]

open access: yes, 2015
We introduce a concise formalism to characterize nanometer-sized tori based on carbon nanotubes and to determine their stability by combining {\em ab initio} density functional calculations with a continuum elasticity theory approach that requires only ...
Chuang, Chern   +5 more
core   +2 more sources

Finitely generated abelian groups of units [PDF]

open access: yes, 2019
In 1960 Fuchs posed the problem of characterizing the groups which are the groups of units of commutative rings. In the following years, some partial answers have been given to this question in particular cases.
Del Corso, Ilaria
core   +2 more sources

Design and construction of a shield for the 9" x 9" NaI(Tl) well-type detector [PDF]

open access: yesNuclear Technology and Radiation Protection, 2014
This paper describes a homemade lead, 15 cm-thick, cylindrical shaped shield of a 9" x 9" NaI(Tl) gamma spectrometric well-type detector. Commercially available lead was melted into cylindrical rings.
Hansman Jan
doaj   +1 more source

ON COMMUTATIVE REDUCED FILIAL RINGS [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2009
AbstractA ring in which every accessible subring is an ideal is called filial. We continue the study of commutative reduced filial rings started in [R. R. Andruszkiewicz and K. Pryszczepko, ‘A classification of commutative reduced filial rings’,Comm. Algebrato appear].
R. R. ANDRUSZKIEWICZ, K. PRYSZCZEPKO
openaire   +1 more source

Rotating black rings on Taub-NUT [PDF]

open access: yes, 2012
In this paper, we construct new solutions describing rotating black rings on Taub-NUT using the inverse-scattering method. These are five-dimensional vacuum space-times, generalising the Emparan-Reall and extremal Pomeransky-Sen'kov black rings to a Taub-
AA Pomeransky   +40 more
core   +1 more source

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