Results 81 to 90 of about 14,054 (185)

Fractional Powers of the Directional Derivative and a Maxwell–Gegenbauer Multipole Identity

open access: yesFractal and Fractional
We study fractional and complex powers of a fixed directional derivative in Rd, defined via a Marchaud-type singular integral representation. Under explicit convergence assumptions, this yields a pointwise nonlocal realization along rays.
Fethi Bouzeffour
doaj   +1 more source

Boost Invarıant Surfaces Wıth Poıntwıse 1-Type Gauss Map In Mınkowskı 4-Space E-1(4) [PDF]

open access: yes, 2014
WOS: 000346107300022In this paper, we study spacelike rotational surfaces which are called boost invariant surfaces in Minkowski 4-space E-1(4). We give necessary and sufficient condition for flat spacelike rotational surface to have pointwise 1-type ...
Yayli, Yusuf, Aksoyak, Ferdag Kahraman
core   +1 more source

Proximal pointwise contraction [PDF]

open access: yes, 2009
In this paper, we introduce the notion of proximal pointwise contraction and obtain the existence of a best proximity point on a pair of weakly compact convex subset of a Banach space and generalize a result of [W.A.
Anuradha, J., Veeramani, P.
core   +1 more source

#29 Artificial Intelligence Characterization of Spatial Patterns of Macula and Their Association With Central Visual Field Progression in Glaucoma

open access: yesGraduate Medical Education Research Journal
Mentor: Robert N. Weinreb Program: Ophthalmology Type: Original Research Background: Preserving central retinal ganglion cells is crucial in glaucoma management, as macular damage in the 10-2 visual field (VF) impacts quality of life. The purpose of this
Golnoush Mahmoudinezhad   +16 more
doaj   +1 more source

Curvature–Cohomology Criterion for Projectivity: A Synthesis of Classical Results in Hodge Theory

open access: yesAxioms
This paper synthesizes classical results in Hodge theory, curvature positivity, and vanishing theorems to give a concise curvature–cohomology criterion for the projectivity of compact Kähler manifolds.
Ghaliah Alhamzi   +5 more
doaj   +1 more source

Some results in harmonic analysis related to pointwise convergence and maximal operators [PDF]

open access: yes, 2012
Pointwise convergence problems are of fundamental importance in harmonic analysis and studying the boundedness of associated maximal operators is the natural viewpoint from which to consider them.
Bailey, Andrew David
core  

Boolean functions with small approximate spectral norm

open access: yesDiscrete Analysis
Boolean functions with small approximate spectral norm, Discrete Analysis 2024:6, 22 pp. Let $G$ be a finite Abelian group and let $f:G\to\mathbb C$.
Tsun Ming Cheung   +3 more
doaj   +1 more source

On rotation surfaces with pointwise 1-type gauss map in euclidean 3-space and minkowski 3-space [PDF]

open access: yes, 2010
Bu çalışma dört bölümden oluşmaktadır. Birinci bölüm giriş için ayrılmıştır. İkinci bölümde Öklid ve yarı-Öklidyen uzaylar tanıtılarak bu uzaylarda yüzeyler ve yüzeylerin geometrisi için gerekli kavramlar verilmiştir.
Sevil, Ayhatun
core  

On the algebraic difference equations un+2un = ψ(un+1) in , related to a family of elliptic quartics in the plane

open access: yesAdvances in Difference Equations, 2005
We continue the study of algebraic difference equations of the type un+2un = ψ(un+1), which started in a previous paper. Here we study the case where the algebraic curves related to the equations are quartics Q(K) of the plane.
Rogalski M, Bastien G
doaj  

On rotational surfaces in pseudo-Euclidean space $\mathbb{E}^4_t$ with pointwise 1-type Gauss map

open access: yes, 2015
In this work, we study some classes of rotational surfaces in the pseudo-Euclidean space $\mathbb{E}^4_t$ with profile curves lying in 2-dimensional planes. First, we determine all such surfaces in the Minkowski 4-space $\mathbb{E}^4_1$ with pointwise 1-type Gauss map of the first kind and second kind. Then, we obtain rotational surfaces in $\mathbb{E}^
Bektaş, B., Canfes, E. Ö., Dursun, U.
openaire   +3 more sources

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