Results 11 to 20 of about 33,732 (253)

On Reversible Group Rings [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2006
Let G be an arbitrary finite group, R be a finite associative ring with identity and RG be the group ring. We show that ℤ2Q8 is the minimal reversible group ring which is not symmetric, and we also characterise the finite rings R for which RQ8 is reversible. The first result extends a result of Gutan and Kisielewicz which shows that ℤ2Q8 is the minimal
Li, Yuanlin   +2 more
openaire   +2 more sources

Extensions of i-reversible rings

open access: yesJournal of Algebra and Its Applications, 2023
A ring [Formula: see text] is said to be i-reversible if for every [Formula: see text] [Formula: see text][Formula: see text], [Formula: see text] is a nonzero idempotent implies [Formula: see text] is an idempotent. It is known that the rings [Formula: see text] and [Formula: see text] (the ring of all upper triangular matrices over [Formula: see ...
Lama, Vivek Bhabani   +3 more
openaire   +2 more sources

Foreign bodies inside us - Trends and knowledge regarding long-acting reversible contraceptives (LARCs) use, factors influencing of contraceptives choice-making process, and the dual-method use among Polish college-aged women

open access: yesJournal of Education, Health and Sport, 2023
Introduction: The choice-making process of the contraceptive method seems complex and influenced by many factors. Long-acting reversible contraceptives require mechanical interference with the woman's body. For some, it will be an insurmountable barrier
Aleksandra Nowak   +2 more
doaj   +1 more source

Polar Solomon rings in ferroelectric nanocrystals

open access: yesNature Communications, 2023
Solomon rings, upholding the symbol of wisdom with profound historical roots, were widely used as decorations in ancient architecture and clothing.
Jing Wang   +21 more
doaj   +1 more source

Images of formal matrices of elements of matrix groups over associative rings

open access: yesНауковий вісник Ужгородського університету. Серія: Математика і інформатика, 2020
The paper substantiates the image by formal matrices of some elements of linear groups over associative rings by using the properties of redundant and fixed modules.
В. М. Петечук   +1 more
doaj   +1 more source

Self dual, reversible and complementary duals constacyclic codes over finite local Frobenius non-chain rings of length 5 and nilpotency index 4.

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2021
Over finite local Frobenius non-chain rings of length 5 and nilpotency index 4 and when the length of the code is relatively prime to the characteristic of the residue field of the ring, the structure of the dual of γ-constacyclic codes is established ...
Castillo-Guillén C. A.   +1 more
doaj   +1 more source

CHARACTERIZATIONS OF t2-REVERSIBLE RINGS

open access: yesSouth East Asian J. of Mathematics and Mathematical Sciences, 2023
This article aims to investigate the ring theoretic structures of (strongly) t2-reversible ring using the concept of non-zero tripotent elements. A ring R is said to be t2-reversible if ab = 0 implies bat2 = 0 for all a,b ∈ R and t is a non-zero tripotent element of R.
Imdadul Hoque, H. M., Khanam, Masuma
openaire   +2 more sources

Recent Progress in Azopyridine-Containing Supramolecular Assembly: From Photoresponsive Liquid Crystals to Light-Driven Devices

open access: yesMolecules, 2022
Azobenzene derivatives have become one of the most famous photoresponsive chromophores in the past few decades for their reversible molecular switches upon the irradiation of actinic light.
Hao Ren, Peng Yang, Haifeng Yu
doaj   +1 more source

Reverse mathematics of rings [PDF]

open access: yes, 2021
<p>Using the tools of reverse mathematics in second-order arithmetic, as developed by Friedman, Simpson, and others, we determine the axioms necessary to develop various topics in commutative ring theory. Our main contributions to the field are as follows.
openaire   +3 more sources

On $\mathcal Z$-reflexive rings [PDF]

open access: yesMathematica Bohemica
We introduce the notion of $\mathcal Z$-reflexive rings to describe reflexivity of rings in terms of their singular ideals. We show that $\mathcal Z$-reflexive ring is proper common generalization of a central reflexive ring, $\mathcal Z$-reversible ring,
Nirbhay Kumar
doaj   +1 more source

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