Results 101 to 110 of about 28,894 (211)

Critical lumpy black holes in AdSp×Sq

open access: yesJournal of High Energy Physics, 2021
In this paper we study lumpy black holes with AdSp × S q asymptotics, where the isometry group coming from the sphere factor is broken down to SO(q).
Biel Cardona, Pau Figueras
doaj   +1 more source

Chern Flat and Chern Ricci-Flat Twisted Product Hermitian Manifolds

open access: yesMathematics
Let (M1,g) and (M2,h) be two Hermitian manifolds. The twisted product Hermitian manifold (M1×M2f,G) is the product manifold M1×M2 endowed with the Hermitian metric G=g+f2h, where f is a positive smooth function on M1×M2.
Shuwen Li   +3 more
doaj   +1 more source

Gap Theorems for Locally Conformally Flat Manifolds [PDF]

open access: yes, 2015
In this paper, we prove a gap result for a locally conformally flat complete non-compact Riemannian manifold with bounded non-negative Ricci curvature and a scalar curvature average condition.
Ma, Li
core  

Kummer-type constructions of almost Ricci-flat 5-manifolds

open access: yesAnnals of Global Analysis and Geometry, 2023
A smooth closed manifold $M$ is called almost Ricci-flat if $$\inf_g||\textrm{Ric}_g||_\infty\cdot \textrm{diam}_g(M)^2=0$$ where $\textrm{Ric}_g$ and $\textrm{diam}_g$ denote the Ricci tensor and the diameter of $g$ respectively and $g$ runs over all Riemannian metrics on $M$.
openaire   +2 more sources

Scaling of Ion Outflow Speed and Ion Bulk Heating in Lobe Reconnection and Their Relations to Shear Flow

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Magnetic reconnection at the high‐latitude magnetopause is accompanied by velocity shear due to the tailward flow of the magnetosheath. This study investigates 24 high‐latitude magnetopause reconnection events observed by the Cluster satellites and examines how ion outflow speed and ion bulk heating depend on the upstream Alfvénic parameters ...
H. Koike, S. Taguchi
wiley   +1 more source

Pseudohermitian geometry on contact Riemannian manifolds [PDF]

open access: yesRendiconti di Matematica e delle Sue Applicazioni, 2002
Starting from work by S. Tanno, [39], and E. Barletta et al., [3], we study the geometry of (possibly non integrable) almost CR structures on contact Riemannian manifolds.
David E. Blair, Sorin Dragomir
doaj  

Matter field Kähler metric in heterotic string theory from localisation

open access: yesJournal of High Energy Physics, 2018
We propose an analytic method to calculate the matter field Kähler metric in heterotic compactifications on smooth Calabi-Yau three-folds with Abelian internal gauge fields.
Ştefan Blesneag   +4 more
doaj   +1 more source

The Use of MALDI‐TOF MS for Microbial Identification of Discolored Vacuum‐Packaged Beef

open access: yesJournal of Food Science, Volume 90, Issue 10, October 2025.
ABSTRACT Vacuum‐packaging technologies have been developed over recent decades to extend the shelf‐life of beef and to provide consumers with standardized, high‐quality products. However, muscles stored under vacuum can still undergo discoloration, likely when animals are exposed to adverse pre‐mortem weather conditions (high air humidity and/or large ...
Alejandro Poveda   +5 more
wiley   +1 more source

Procedural Multiscale Geometry Modeling using Implicit Surfaces

open access: yesComputer Graphics Forum, Volume 44, Issue 7, October 2025.
Abstract Materials exhibit geometric structures across mesoscopic to microscopic scales, influencing macroscale properties such as appearance, mechanical strength, and thermal behavior. Capturing and modeling these multiscale structures is challenging but essential for computer graphics, engineering, and materials science.
Bojja Venu   +2 more
wiley   +1 more source

Nonlinear Systems of PDEs Admitting Infinite‐Dimensional Lie Algebras and Their Connection With Ricci Flows. II: The Two‐Dimensional Space Case

open access: yesStudies in Applied Mathematics, Volume 155, Issue 4, October 2025.
ABSTRACT Motivated by previous results in special cases associated with Ricci flows, all possible two‐components evolutions systems of (1+2)‐dimensional second‐order partial differential equations (PDEs) admitting an infinite‐dimensional Lie algebra are constructed. It is shown that a natural generalization of this Lie algebra to the higher‐dimensional
Roman Cherniha, John R. King
wiley   +1 more source

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