Results 61 to 70 of about 938,544 (352)

On Total Shear Curvature of Surfaces in E^{n+2}

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018
In the present study we consider surfaces in Euclidean (n+2)-space Eⁿ⁺². Firstly, we introduce some basic concepts of second fundamental form and curvatures of the surfaces in Eⁿ⁺².
Kadri Arslan, Betül Bulca
doaj   +1 more source

Constraints on primordial curvature spectrum from primordial black holes and scalar-induced gravitational waves

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
The observational data of primordial black holes and scalar-induced gravitational waves can constrain the primordial curvature perturbation at small scales. We parameterize the primordial curvature perturbation by a broken power law form and find that it
Zhu Yi, Qin Fei
doaj   +1 more source

Conchoidal Surfaces in Euclidean 3-space Satisfying $\Delta x_{i}=\lambda _{i}x_{i}$

open access: yesUniversal Journal of Mathematics and Applications, 2023
In this paper, we study the conchodial surfaces in 3-dimensional Euclidean space with the condition $\Delta x_{i}=\lambda _{i}x_{i}$ where $\Delta $ denotes the Laplace operator with respect to the first fundamental form.
Tuğçe Dirim, Betül Bulca Sokur
doaj   +1 more source

Equi-Gaussian curvature folding

open access: yesProceedings Mathematical Sciences, 2007
In this paper the authors introduce the notion of equi-Gaussian curvature folding and consider some elementary properties of it.
El-Kholy, E. M.   +2 more
openaire   +2 more sources

A-Net Ruled Surface Which Generated By First Principle Direction Curve In E3

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2017
In this paper, we give a new parametrization of A- net surface which generated by first principle direction curve Euclidean 3- space . Then, we obtain mean curvature and Gaussian curvature of this surface.
Talat KÖRPINAR, Gülden ALTAY SUROĞLU
doaj   +1 more source

Developable Surfaces Foliated by General Ellipses in Euclidean Space R3

open access: yesMathematics, 2023
In this article, we classify the developable surfaces in three-dimensional Euclidean space R3 that are foliated by general ellipses. We show that the surface has constant Gaussian curvature (CGC) and is foliated by general ellipses if and only if the ...
Ahmad T. Ali
doaj   +1 more source

Gaussian curvature directs the distribution of spontaneous curvature on bilayer membrane necks [PDF]

open access: yesbioRxiv, 2017
Formation of membrane necks is crucial for fission and fusion in lipid bilayers. In this work, we seek to answer the following fundamental question: what is the relationship between protein-induced spontaneous mean curvature and the Gaussian curvature at
M. Chabanon, P. Rangamani
semanticscholar   +1 more source

Predicting Epileptogenic Tubers in Patients With Tuberous Sclerosis Complex Using a Fusion Model Integrating Lesion Network Mapping and Machine Learning

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Accurate localization of epileptogenic tubers (ETs) in patients with tuberous sclerosis complex (TSC) is essential but challenging, as these tubers lack distinct pathological or genetic markers to differentiate them from other cortical tubers.
Tinghong Liu   +11 more
wiley   +1 more source

Behavior of the Gaussian curvature of timelike minimal surfaces with singularities [PDF]

open access: yesHokkaido Mathematical Journal, 2017
In the 3-dimensional Lorentz-Minkowski space we prove that the sign of the Gaussian curvature of any timelike minimal surface is determined by the degeneracy and the orientations of the two null curves that generate the surface.
S. Akamine
semanticscholar   +1 more source

Smooth Random Surfaces from Tight Immersions?

open access: yes, 1993
We investigate actions for dynamically triangulated random surfaces that consist of a gaussian or area term plus the {\it modulus} of the gaussian curvature and compare their behavior with both gaussian plus extrinsic curvature and ``Steiner'' actions ...
A. Billoire   +32 more
core   +1 more source

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