Results 101 to 110 of about 29,467 (233)
Environmental Microbiology, Volume 28, Issue 5, May 2026.Bacteria are not the primary cause of growth anomalies (GA) in Isopora palifera at the Cocos (Keeling) Islands. While microbial communities differ between GA‐affected and healthy corals, no specific bacterial taxa were linked to disease, suggesting that other factors, such as viruses, may drive GA onset and progression.
Sophie Preston +6 more
wiley +1 more source
Mass-deformed M2 branes in Stenzel space
Journal of High Energy Physics, 2017 We obtain finite-temperature M2 black branes in 11-dimensional supergravity, in a G 4-flux background whose self-dual part approaches a solution of Cvetič, Gibbons, Lü, and Pope, based upon Stenzel’s family of Ricci-flat Kähler deformed cones.
Óscar J. C. Dias +3 more
doaj +1 more source
Littlewood, Paley and almost‐orthogonality: a theory well ahead of its time
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract The classic paper by Littlewood and Paley [J. Lond. Math. Soc. (1), 6 (1931), 230–233] marked the birth of Littlewood–Paley theory. We discuss this paper and its impact from a historical perspective, include an outline of the results in the paper and their subsequent significance in relation to developments over the last century, and set them ...
Anthony Carbery
wiley +1 more source
Symbolic approximations to Ricci-flat metrics via extrinsic symmetries of Calabi–Yau hypersurfaces
Machine Learning: Science and TechnologyEver since Yau’s non-constructive existence proof of Ricci-flat metrics on Calabi–Yau (CY) manifolds, finding their explicit construction remains a major obstacle to development of both string theory and algebraic geometry.
Viktor Mirjanić, Challenger Mishra
doaj +1 more source
Lorentzian homogeneous structures with indecomposable holonomy
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract For a Lorentzian homogeneous space, we study how algebraic conditions on the isotropy group affect the geometry and curvature of the homogeneous space. More specifically, we prove that a Lorentzian locally homogeneous space is locally isometric to a plane wave if it admits an Ambrose–Singer connection with indecomposable, non‐irreducible ...
Steven Greenwood, Thomas Leistner
wiley +1 more source
Isoperimetric inequalities on slabs with applications to cubes and Gaussian slabs
Communications on Pure and Applied Mathematics, Volume 79, Issue 4, Page 1012-1072, April 2026.Abstract We study isoperimetric inequalities on “slabs”, namely weighted Riemannian manifolds obtained as the product of the uniform measure on a finite length interval with a codimension‐one base. As our two main applications, we consider the case when the base is the flat torus R2/2Z2$\mathbb {R}^2 / 2 \mathbb {Z}^2$ and the standard Gaussian measure
Emanuel Milman
wiley +1 more source
Novel Theorems on Spacetime Admitting Pseudo-W2 Curvature Tensor
Journal of MathematicsThis paper investigates spacetime manifolds admitting a pseudo-W2 curvature tensor. We show that a pseudo-W2 flat spacetime is an Einstein manifold and therefore has constant curvature.
B. B. Chaturvedi +2 more
doaj +1 more source
On quasirecurrent manifolds [PDF]
Mathematica BohemicaWe introduce a type of Riemannian manifolds (namely, quasirecurrent manifold) and study its several geometric properties. Among others, we prove that the scalar curvature of such a manifold is constant, and that the manifold is Einstein under certain ...
Jaeman Kim
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Cocalibrated G_2-manifolds with Ricci flat characteristic connection
, 2013 Any 7-dimensional cocalibrated G_2-manifold admits a unique connection $\nabla$ with skew symmetric torsion. We study these manifolds under the additional condition that the $\nabla$-Ricci tensor vanishes. In particular, we describe their geometry in case of a maximal number of $\nabla$-parallel vector fields.
openaire +3 more sources
On LP-Kenmotsu Manifold with Regard to Generalized Symmetric Metric Connection of Type (α, β)
MathematicsIn the current article, we examine Lorentzian para-Kenmotsu (shortly, LP-Kenmotsu) manifolds with regard to the generalized symmetric metric connection ∇G of type (α,β).
Doddabhadrappla Gowda Prakasha +3 more
doaj +1 more source