Results 31 to 40 of about 596,380 (184)

Zeros of block-symmetric polynomials on Banach spaces

open access: yesМатематичні Студії, 2020
We investigate sets of zeros of block-symmetric polynomials on the direct sums of sequence spaces. Block-symmetric polynomials are more general objects than classical symmetric polynomials.
V. Kravtsiv
doaj   +1 more source

Greedy Sums and Dirichlet Series [PDF]

open access: yes, 2011
We prove that the greedy sum of a direct product of two numeric arrays of complex numbers is equal to the product of the greedy sums of the factors provided that all the mentioned sums exist.Comment: 3 ...
Shchepin, Evgeny
core  

Rings decomposed into direct sums of J-rings and nil rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
Let R be a ring (not necessarily with identity) and let E denote the set of idempotents of R. We prove that R is a direct sum of a J-ring (every element is a power of itself) and a nil ring if and only if R is strongly π-regular and E is contained in ...
Hisao Tominaga
doaj   +1 more source

Strongly K-nonsingular Modules

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2019
       A submodule N of a module M  is said to be s-essential if it has nonzero intersection with any nonzero small submodule in M. In this article, we introduce and study a class of modules in which all its nonzero endomorphisms have non-s-essential ...
Tha'ar Younis Ghawi
doaj   +1 more source

Supplements Related to Normal π-Projective Hypermodules

open access: yesMathematics, 2022
In this study, the role of supplements in Krasner hypermodules is examined and related to normal π-projectivity. We prove that the class of supplemented Krasner hypermodules is closed under finite sums and under quotients.
Burcu Nişancı Türkmen   +2 more
doaj   +1 more source

The Similarity Degree of Some C*-algebras

open access: yes, 2012
We define the class of weakly approximately divisible unital C*-algebras and show that this class is closed under direct sums, direct limits, any tensor product with any C*-algebra, and quotients. A nuclear C*-algebra is weakly approximately divisible if
Hadwin, Don, Li, Weihua
core   +1 more source

k-Smooth Points in Some Banach Spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2015
We characterize the k-smooth points in some Banach spaces. We will deal with injective tensor product, the Bochner space L∞(μ,X) of (equivalence classes of) μ-essentially bounded measurable X-valued functions, and direct sums of Banach spaces.
A. Saleh Hamarsheh
doaj   +1 more source

Colimits in the correspondence bicategory

open access: yes, 2016
We interpret several constructions with C*-algebras as colimits in the bicategory of correspondences. This includes crossed products for actions of groups and crossed modules, Cuntz-Pimsner algebras of proper product systems, direct sums and inductive ...
Albandik, Suliman, Meyer, Ralf
core   +1 more source

Investigating the Relationship between Body Cell Mass Index, Phase Angle, and Hematological Indices Indicating Inflammation with Quality of Life in the Personnel of Shiraz University of Medical Sciences: A Cross-sectional Study of the Cohort Study [PDF]

open access: yesمجله علوم پزشکی صدرا
Introduction: Numerous studies reported a strong relationship between inflammation and reduced quality of life. This study aimed to investigate the relationship between body cell mass index (BCMI), phase angle, and hematological indices indicating ...
Seyed Jalil Masoumi   +5 more
doaj   +1 more source

On modules which are self-slender [PDF]

open access: yes, 2009
This paper is an examination of the dual of the fundamental isomorphism relating homomorphism groups involving direct sums and direct products over arbitrary index sets. We prove that for every cardinal μ, with μ ℵ0 = μ, there exists a non-slender self-
Gobel, Rüdiger   +2 more
core   +2 more sources

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