Results 91 to 100 of about 1,126,452 (304)

A Note on Weighted Polynomial Approximation with Varying Weights

open access: yesJournal of Approximation Theory, 1996
The author gives a new (shortened) proof and at the same time a stronger version of a theorem due to \textit{V. Totik} [Weighted approximation with varying weight (1994; Zbl 0808.41001), Theorem 4.1]. The central result of the present paper can be stated as follows: If a sequence of weighted polynomials \(w^np_n\), where \(w\) is an admissible weight ...
openaire   +2 more sources

On weighted polynomial approximation with monotone weights [PDF]

open access: yesProceedings of the American Mathematical Society, 2000
We construct an even weight W W monotone on the right half line such that the logarithmic integral of the largest
openaire   +2 more sources

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Weighted Approximation for Jackson-Matsuoka Polynomials on the Sphere

open access: yesAbstract and Applied Analysis, 2012
We consider the best approximation by Jackson-Matsuoka polynomials in the weighted Lp space on the unit sphere of Rd. Using the relation between K-functionals and modulus of smoothness on the sphere, we obtain the direct and inverse estimate of ...
Guo Feng
doaj   +1 more source

Quantitative-Voronovskaya and Grüss-Voronovskaya type theorems for Szász-Durrmeyer type operators blended with multiple Appell polynomials

open access: yesJournal of Inequalities and Applications, 2017
In this paper, we establish a link between the Szász-Durrmeyer type operators and multiple Appell polynomials. We study a quantitative-Voronovskaya type theorem in terms of weighted modulus of smoothness using sixth order central moment and Grüss ...
Trapti Neer, Purshottam Narain Agrawal
doaj   +1 more source

Generalized Weighted Statistical Convergence for Double Sequences of Fuzzy Numbers and Associated Korovkin-Type Approximation Theorem

open access: yesJournal of Function Spaces, 2020
We define the notions of weighted λ,μ-statistical convergence of order γ1,γ2 and strongly weighted λ,μ-summability of γ1,γ2 for fuzzy double sequences, where ...
Abdullah Alotaibi
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Degree of Monotone Approximation in , p Lα Spaces

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2017
The aim of this paper is to study the best approximation of unbounded functions in the weighted spaces , 1, 0 , p p L α α ≥>.
I. Z. Shamkhi, S. K. Jassim
doaj  

Approximation algorithms for weighted matching

open access: yesTheoretical Computer Science, 1987
Approximation algorithms are given for the maximum weighted matching problem in planar and other n-vertex graphs of genus ...
openaire   +3 more sources

Developmental programmes drive cellular plasticity, disease progression and therapy resistance in lung adenocarcinoma

open access: yesMolecular Oncology, EarlyView.
This study shows that lung adenocarcinomas exploit developmental branching morphogenesis to acquire a therapy resistant basal‐like tumour cell state. This process was found to be regulated by combined TP53 loss‐of‐function and type‐I interferon signalling, identifying a novel axis for biomarker and therapeutic target discovery.
Kamila J Bienkowska   +13 more
wiley   +1 more source

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