Results 71 to 80 of about 5,989,700 (306)

A discussion on best proximity point and coupled best proximity point in partially ordered metric spaces [PDF]

Fixed Point Theory and Applications, 2015
AbstractIn this paper we establish some best proximity point results using generalized weak contractions with discontinuous control functions. The theorems are established in metric spaces with a partial order. We view the main problem in the paper as a problem of finding an optimal approximate solution of a fixed point equation.
Choudhury, Binayak S, Metiya, Nikhilesh, Postolache, Mihai, Konar, Pulak   +3 more
openaire   +2 more sources

Epigenetic reprogramming of lineage switching in cancer

FEBS Letters, EarlyView.
Cancer cells rarely commit to a single identity. Epigenetic mechanisms and tumor microenvironment cues push epithelial cells toward flexible, hybrid states that can shift into mesenchymal, neuroendocrine, or stem‐like fates, driving metastasis, drug resistance, and tumor heterogeneity. Targeting the epigenetic regulators behind these transitions, using
Ezgi Boyvatlı, Burcu Akman, Ezgi Bağırsakçı, Nese Atabey, Serap Erkek‐Ozhan   +4 more
wiley   +1 more source

BEST PROXIMITY POINTS FOR MULTIVALUED MAPPINGS AND EQUATION OF MOTION

Journal of Applied Analysis & Computation
In this manuscript, we compute coincidence point, best proximity point, and fixed point results for multivalued proximal contractions in the setup of b − metric spaces using an alternating distance function. Moreover, we show the corresponding results for
M. Younıs, H. Ahmad, W. Shahid
semanticscholar   +1 more source

Best Proximity Point forα-ψ-Proximal Contractive Multimaps

Abstract and Applied Analysis, 2014
Extendemos las nociones de contracción α-ψ-proximal y admisibilidad α-proximal a mapas multivaluados y luego, utilizando estas nociones, obtenemos algunos de los mejores teoremas de puntos de proximidad para mapeos multivaluados. Nuestros resultados amplían algunos resultados recientes de Jleli y los que figuran en ellos. Algunos ejemplos se construyen
Muhammad Usman Ali, Tayyab Kamran, Naseer Shahzad   +2 more
openaire   +2 more sources

Autophagy and mitophagy in pancreatic β‐cell homeostasis and their involvement in diabetes pathophysiology

FEBS Letters, EarlyView.
This review focuses on the role of autophagy and mitophagy in maintaining pancreatic β‐cell function and homeostasis. We discuss how genetic defects affecting these pathways contribute to the development of type 1, type 2, monogenic, and gestational diabetes. We further explore their potential as therapeutic targets. Created in BioRender.
Yunkyeong Lee, Mingming Tong, Anna L. Gloyn   +2 more
wiley   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Corrigendum to the paper “Equivalence of the existence of best proximity points and best proximity pairs for cyclic and noncyclic nonexpansive mappings”

Demonstratio Mathematica, 2021
The purpose of this short note is to present a correction of the proof of the main result given in the paper “Equivalence of the existence of best proximity points and best proximity pairs for cyclic and noncyclic nonexpansive mappings,” Demonstr.
Gabeleh Moosa
doaj   +1 more source

Best Proximity Points of Multivalued Hardy-Roger’s Type (Cyclic) Contractive Mappings of b-Metric Spaces

, 2022
In this article, we introduce a new type of generalized multivalued Hardy and Roger’s type proximal contractive and proximal cyclic contractive mappings of b-metric spaces and develop some results for the existence of best proximity point(s).
Azhar Hussain, Arshad Ali Khan, Basit Ali   +2 more
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Best proximity points of p-cyclic orbital Meir–Keeler contraction maps

Nonlinear Analysis, 2016
Let (X,d) be a metric space and A1, A2, ..., Ap be nonempty subsets of X. We introduce a self map T on X, called p-cyclic orbital contraction map on the union of A1, A2, ..., Ap and obtain a unique best proximity point of T.
Saravanan Karpagam, Boyan Zlatanov
doaj   +1 more source