Results 21 to 30 of about 3,955 (121)

On conformally recurrent manifolds of dimension greater than 4

, 2016
Conformally recurrent pseudo-Riemannian manifolds of dimension n>4 are investigated. The Weyl tensor is represented as a Kulkarni-Nomizu product. If the square of the Weyl tensor is nonzero, a covariantly constant symmetric tensor is constructed, that is
Mantica, Carlo A., Molinari, Luca G.
core   +1 more source

Natural connection with totally skew-symmetric torsion on almost contact manifolds with B-metric

, 2011
A natural connection with totally skew-symmetric torsion on almost contact manifolds with B-metric is constructed. The class of these manifolds, where the considered connection exists, is determined.
Friedrich T., Ganchev G., Gaudochon P., Kobayshi S., MANCHO MANEV, Mekerov D., Mekerov D., Mekerov D.   +7 more
core   +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley   +1 more source

Experimental Dataset From Full‐Scale Near‐Collapse Tests on Two‐Storey, Two‐Bay Masonry‐Infilled Reinforced Concrete Frames With Timber‐Based Reinforced Concrete‐Timber Panel Seismic Retrofit

Earthquake Spectra, Volume 42, Issue 2, May 2026.
This study describes a dataset from an experimental campaign investigating the quasi‐static cyclic lateral response of two full‐scale, two‐storey, two‐bay reinforced concrete (RC) frames with masonry infills representative of mid‐20th century European construction practice.
Nikolaos Stathas, Andrea Bartolotti, Nicolò Damiani, Stathis Bousias, Francesco Smiroldo, Albino Angeli, Dmytro Dizhur, Francesco Graziotti, Ivan Giongo   +8 more
wiley   +1 more source

Deforming the Double‐Scaled SYK and Reaching the Stretched Horizon From Finite Cutoff Holography

Fortschritte der Physik, Volume 74, Issue 5, May 2026.
ABSTRACT We study the properties of the double‐scaled SYK (DSSYK) model under chord Hamiltonian deformations based on finite cutoff holography for general dilaton gravity theories with Dirichlet boundaries. The formalism immediately incorporates a lower‐dimensional analog of TT¯(+Λ2)$\text{T}\overline{\text{T}}(+\Lambda _2)$ deformations, denoted T2 ...
Sergio E. Aguilar‐Gutierrez
wiley   +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

Weakly B-Symmetric Warped Product Manifolds with Applications

Axioms
This work presents a comprehensive study of weakly B-symmetric warped product manifolds (WBS)n, a natural extension of several classical curvature-restricted geometries including B-flat, B-parallel, and B-recurrent manifolds.
Bang-Yen Chen, Sameh Shenawy, Uday Chand De, Safaa Ahmed, Hanan Alohali   +4 more
doaj   +1 more source

Nonnegatively curved Euclidean submanifolds in codimension two

, 2016
We provide a classification of compact Euclidean submanifolds $M^n\subset{\mathbb{R}}^{n+2}$ with nonnegative sectional curvature, for $n\ge 3$. The classification is in terms of the induced metric (including the diffeomorphism classification of the ...
Florit, Luis A., Ziller, Wolfgang
core   +1 more source

On‐Demand Cargo Release via Low‐Voltage Actuated Flexible Microchamber Arrays

Advanced Materials Technologies, Volume 11, Issue 8, 17 April 2026.
On‐demand triggering of cargoes’ release from free standing array of biocompatible microchambers may be actuated by electrical stimuli at voltages as low as 1 V, even making them suitable for implantation in living beings for drug delivery purposes.
Stefania Boi, Valentina Ricci, Maddalena Botti, Simone L. Marasso, Valentina Sinisi, Davide Vurro, Rishit Mohan Ahuja, Alberto Ballesio, Matteo Cocuzza, Saksham Sharma, Giuseppe Tarabella, Salvatore Iannotta, Pasquale D'Angelo   +12 more
wiley   +1 more source

Geometry of Quaternionic K\"ahler connections with torsion

, 2000
The target space of a (4,0) supersymmetric two-dimensional sigma model with Wess-Zumino term has a connection with totally skew-symmetric torsion and holonomy contained in Sp(n).Sp(1), QKT-connection. We study the geometry of QKT-connections.
Alekseevsky, Alekseevsky, Alekseevsky, Alekseevsky, Atiyah, Berger, Bismut, Bonan, Bonneau, Boyer, Gates, Gauduchon, Gauduchon, Gauduchon, Grantcharov, Hitchin, Howe, Howe, Howe, Ishihara, Madsen, Madsen, Madsen, Newlander, Nishino, Obata, Ornea, Ornea, Pedersen, Pedersen, Pedersen, Salamon, Salamon, Salamon, Stefan Ivanov, Tod   +35 more
core   +1 more source