Results 91 to 100 of about 278,852 (350)

On a fixed point theorem of Pathak [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1991
It is shown that the continuity of the mapping in Pathak′s fixed point theorem for normed spaces is not necessary.
openaire   +3 more sources

A Unified Enhanced Quasi‐Electrostatic 3D Charge Model for Accurate Prediction and Design Optimization of Contact‒Separation Triboelectric Nanogenerators

open access: yesAdvanced Materials Technologies, EarlyView.
New theoretical model for vertical contact and separation mode triboelectric nanogenerator is proposed. Detailed derivation process and results are discussed. Numerical solutions and parametric studies are presented. Calculated results are validated by experimental outcomes.
Seokjin Kim   +2 more
wiley   +1 more source

Some Integral Type Fixed Point Theorems for Non-Self-Mappings Satisfying Generalized (ψ,φ)-Weak Contractive Conditions in Symmetric Spaces

open access: yesAbstract and Applied Analysis, 2014
The aim of this paper is to obtain some new integral type fixed point theorems for nonself weakly compatible mappings in symmetric spaces satisfying generalized (ψ,φ)-contractive conditions employing the common limit range property.
Marwan Amin Kutbi   +3 more
doaj   +1 more source

A fixed point theorem for distributions

open access: yesStochastic Processes and their Applications, 1992
The author studies, in a systematic form, the contractive behavior of the map \(S\) of distributions to distributions \(S(F)\overset{\mathcal D}=\sum_ i T_ i X_ i+C\), \((C,T=(T_ 1,T_ 2,\dots))\), \(X_ i\) are independent random variables with distribution function \(F\). Further the author obtains the higher and exponential moments of the fixed point.
openaire   +2 more sources

A fixed-point theorem for trees [PDF]

open access: yesBulletin of the American Mathematical Society, 1941
Not ...
openaire   +3 more sources

3D Meta‐Atoms for High Confinement of Mid‐IR Radiation

open access: yesAdvanced Optical Materials, EarlyView.
Mid‐infrared, three‐dimensional circuit‐like resonators with extreme field confinement are experimentally demonstrated. Combining simulations, measurements, and analytical modelling, a physical interpretation and prediction of the resonant modes supported by the structure, including their resonant frequency and radiative and non‐radiative losses, is ...
Francesco Pisani   +5 more
wiley   +1 more source

Some new fixed point theorems for α-Geraghty contraction type maps in metric spaces

open access: yes, 2014
We generalize the results obtained in Cho et al. (Fixed Point Theory Appl. 2013:329, 2013) and give other conditions to prove the existence and uniqueness of a fixed point of α-Geraghty contraction type maps in the context of a complete metric space.
O. Popescu
semanticscholar   +1 more source

Quantum Emitters in Rhombohedral Boron Nitride

open access: yesAdvanced Optical Materials, EarlyView.
Rhombohedral boron nitride (rBN) is an emerging wide‐bandgap van der Waals (vdW) material with strong second‐order nonlinear optical properties. In this work, optically‐addressable spin defects and single‐photon emitters (SPEs) are fabricated deterministically in rBN.
Angus Gale   +10 more
wiley   +1 more source

Fixed point theorems of generalized Lipschitz mappings on cone metric spaces over Banach algebras without assumption of normality

open access: yes, 2014
In this paper, we first present some elementary results concerning cone metric spaces over Banach algebras. Next, by using these results and the related ones about c-sequence on cone metric spaces we obtain some new fixed point theorems for the ...
Shaoyuan Xu, S. Radenović
semanticscholar   +1 more source

Incoherent Digital Holography Empowered by Wavefront and Information Engineering: A Review

open access: yesAdvanced Photonics Research, EarlyView.
Advancements in incoherent digital holography (IDH) have been achieved via wavefront engineering (using spatial light modulators, diffractive optics, and metasurfaces) and information engineering (using compressive sensing and deep learning). This paper presents an overview of IDH with wavefront and information engineering, paving the way toward its ...
Teruyoshi Nobukawa
wiley   +1 more source

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