Results 31 to 40 of about 2,636,208 (102)

Spectral Properties of n-perinormal operators

open access: yes, 2012
In this paper we study spectral properties of class (M,n) or n -perinormal operators. It is shown that if T belongs to class (M,n) , then its point spectrum and joint point spectrum are identical.
S. Mécheri, N. Braha
semanticscholar   +1 more source

Berezin number inequalities for operators

open access: yesConcrete Operators, 2019
The Berezin transform à of an operator A, acting on the reproducing kernel Hilbert space ℋ = ℋ (Ω) over some (non-empty) set Ω, is defined by Ã(λ) = 〉Aǩ λ, ǩ λ〈 (λ ∈ Ω), where k⌢λ=kλ‖kλ‖${\mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown ...
Bakherad Mojtaba, Garayev Mubariz T.
doaj   +1 more source

Some new bounds for the generalized triangle inequality

open access: yes, 2012
In this paper we present some new inequalities in normed linear spaces which much improve the triangle inequality. Our results refine and generalize the corresponding ones obtained by Mitani et al.
H. Dehghan
semanticscholar   +1 more source

Secondary metabolite estimation and antioxidant potential assessment of purple bell Thunbergia erecta (Benth.) T. Anderson

open access: yesInternational Journal of Secondary Metabolite, 2023
To quantify the aqueous and methanolic extracts for primary and secondary metabolites, and the antioxidant potential of leaf extracts of the Thunbergia erecta plant and to adopt them in Ayurvedic medications for various illnesses.
Nitin Kochar   +4 more
semanticscholar   +1 more source

Some majorization inequalities for convex functions of several variables

open access: yes, 2011
The purpose of this note is to prove some weak majorization inequalities involving convex functions of several variables. A sub-additive inequality for separately matrix convex functions is also proved.
Jagjit Singh Matharu, J. Aujla
semanticscholar   +1 more source

antiSMASH 5.0: updates to the secondary metabolite genome mining pipeline

open access: yesNucleic Acids Res., 2019
Secondary metabolites produced by bacteria and fungi are an important source of antimicrobials and other bioactive compounds. In recent years, genome mining has seen broad applications in identifying and characterizing new compounds as well as in ...
K. Blin   +7 more
semanticscholar   +1 more source

A simulation algorithm for a single server retrial queuing system with batch arrivals

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
Many systems of real word are modeled by retrial queuing system with batch arrivals. Analytical formulas for this class of systems are complicated and address only particular cases.
Florea Ion, Nǎnǎu Corina-Ştefania
doaj   +1 more source

Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China

open access: yesNational Science Review, 2020
To control the spread of the 2019 novel coronavirus (COVID-19), China imposed nationwide restrictions on the movement of its population (lockdown) after the Chinese New Year of 2020, leading to large reductions in economic activities and associated ...
Xin Huang   +26 more
semanticscholar   +1 more source

Sampling theory, oblique projections and a question by Smale and Zhou [PDF]

open access: yes, 2006
In a recent article, Smale and Zhou define a notion of rich data for sampling problems and reconstruction of signals from a discrete set of samples and study different least-square problems related with the minimization of the error.
Antezana, Jorge Abel, Corach, Gustavo
core   +1 more source

An extension of the Hardy-Littlewood inequality

open access: yes, 1979
The Hardy-Littlewood inequality is extended from I? to i? where w is any positive nondecreasing function. In this note we establish the inequality (fjyf w)' oo. (3) Since w(t) is nondecreasing we have /OO T f 00 1 \y"\2 < j \y^\2w, i = 0,2.
M. Kwong, A. Zettl
semanticscholar   +1 more source

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