Results 41 to 50 of about 195 (135)

On the Rings Whose Injective Modules Are Max-Projective

, 2023
In this thesis, for some classes of rings including, local, semilocal right semihereditary and right Noetherian right nonsingular, we obtain some conditions that equivalent to being right max-QF. For example, for a semilocal right semihereditary ring, we
Yurtsever, Haydar Baran
core  

Parabolic subgroups of groups of column-finite infinite matrices [PDF]

, 2012
For a wide class of rings R that contains all local and semilocal rings, we consider the group SLVK(R) of all matrices over R of the form ab0c, in which a is a finite matrix with determinant 1 and c is an upper triangular infinite matrix with the main ...
Słowik, Roksana, Hołubowski, Waldemar
core   +1 more source

Local‐Hybrid Functional With a Composite Local Mixing Function Built From a Neural Network and a Strong‐Correlation Model

Journal of Computational Chemistry, Volume 47, Issue 3, 30 January 2026.
A new local hybrid functional, LH25nP, is reported, that uses a neural‐network local mixing function for the position‐dependence of exact‐exchange admixture trained with a human‐designed strong‐correlation factor. It thereby escapes the usual zero‐sum game between delocalization and static‐correlation errors.
Artur Wodyński, Martin Kaupp
wiley   +1 more source

Homological Dimension of Skew Group Rings and Crossed Products

, 1994
In this paper we study the homological dimension of skew group rings and crossed products. A sufficient condition for R ∗ G, a crossed product, to have finite right global dimension is given, in terms of crossed products over simple Artinian factors of R
Yi, Z.
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Torsion classes of extended Dynkin quivers over commutative rings

Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.
Abstract For a Noetherian R$R$‐algebra Λ$\Lambda$, there is a canonical inclusion torsΛ→∏p∈SpecRtors(κ(p)Λ)$\mathop {\mathsf {tors}}\Lambda \rightarrow \prod _{\mathfrak {p}\in \operatorname{Spec}R}\mathop {\mathsf {tors}}(\kappa (\mathfrak {p})\Lambda)$, and each element in the image satisfies a certain compatibility condition.
Osamu Iyama, Yuta Kimura
wiley   +1 more source

On some classes of modules and their endomorphism rings [PDF]

, 2014
In [33], it was proved that an injective module is indecomposable if and only if its endomorphism ring is local. The first aim of this thesis is to generalize this result from indecomposable modules to square-free ones by showing that an injective module
Bien, M.H.
core  

Sigma-cotorsion rings [PDF]

, 2005
It is proved that a ring R is right perfect if and only if it is Σ-cotorsion as a right module over itself. Several other conditions are shown to be equivalent. For example, that every pure submodule of a free right R-module is strongly pure-essential in
Guil Asensio, Pedro A., Herzog, Ivo
core   +1 more source

Hereditary crossed product orders over discrete valuation rings [PDF]

, 2012
In this paper, we consider weak crossed product orders Af=∑Sxσ with coefficients in the integral closure S of a discrete valuation ring R in a tamely ramified Galois extension of the field of fractions of R.
Wilson, Christopher James
core   +1 more source

Effect of temperature on structural, dynamical, and electronic properties of Sc₂Te₃ from first-principles calculations. [PDF]

RSC Adv, 2022
Zewdie GM, Debela TT, Asres GA.
europepmc   +1 more source

Symmetric Forms over Semilocal Rings

, 2020
В работе рассматриваются симметричные матрицы, квадрики и квадратичные формы (включая вырожденные) над полулокальными кольцами.The necessary and sufficient conditions for congruence of quadratic forms over a local ring with a principal maximal ideal ...
Старикова, Ольга А., Starikova, Оl’ga A.   +1 more
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