Results 91 to 100 of about 1,389 (159)

Finite Element Approximation for a Reformulation of a 3D Fluid–2D Plate Interaction System

Numerical Methods for Partial Differential Equations, Volume 42, Issue 4, July 2026.
ABSTRACT We study a finite element approximation of a coupled fluid‐structure interaction consisting of a three‐dimensional incompressible viscous fluid governed by the unsteady Stokes equations and a two‐dimensional elastic plate. To avoid the use of H2−$$ {H}^2- $$conforming or nonconforming ℙ2$$ {\mathbb{P}}_2 $$‐Morley plate elements, the fourth ...
Lander Besabe, Hyesuk Lee
wiley   +1 more source

A relative Poincaré–Birkhoff theorem

Bulletin of the London Mathematical Society, Volume 58, Issue 7, July 2026.
Abstract A. Moreno and Otto van Koert proved a generalised version of the classical Poincaré–Birkhoff theorem, for Liouville domains of any dimension. In this article, we prove a relative version for Lagrangians with Legendrian boundary. This gives interior chords of arbitrary large length, provided that the twist condition introduced by Moreno and van
Agustin Moreno, Arthur Limoge
wiley   +1 more source

An elegant model of the geodesic flow on the modular surface

Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.
Abstract Caroline Series' [The modular surface and continued fractions, J. Lond. Math. Soc. (2), 31, no. 1, (1985), 69–80] gives a clear framework linking, in a deceptively simple way, the dynamics of the geodesic flow on the modular surface with the dynamics of the regular continued fraction, through a well‐chosen symbolic coding.
Pierre Arnoux, Thomas A. Schmidt
wiley   +1 more source

Affine hypersurfaces and superintegrable systems

Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.
Abstract It was recently shown that under mild assumptions, second‐order conformally superintegrable systems can be encoded in a (0,3)‐tensor, called structure tensor. For abundant systems, this approach led to algebraic integrability conditions that essentially allow one to restore a system from the knowledge of its structure tensor in a point on the ...
Vicente Cortés, Andreas Vollmer
wiley   +1 more source

A Higher-order poincaré ellipsoid representation for non-cylindrical vector beams

Discover Applied Sciences
The Higher-Order Poincaré Sphere (HOPS) provides a powerful geometrical tool for representing vector beams as points on the surface of a unitary sphere. Since a particular position on the surface represents any spatial mode regardless of its shape, this ...
Dayver Daza-Salgado, Edgar Medina-Segura, Valeria Rodriguez-Fajardo, Benjamin Perez-Garcia, Carmelo Rosales-Guzmán   +4 more
doaj   +1 more source

String topology via the coHochschild complex and local intersections

Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.
Abstract We construct an algebraic model for the Chas–Sullivan product and the Goresky–Hingston coproduct in string topology. The construction takes as its initial input a simplicial complex equipped with a local pairing on its simplicial chains, for instance, a homology manifold with its local intersection pairing.
Manuel Rivera, Alex Takeda
wiley   +1 more source

The role of the curvature of a surface in the shape of the solutions to elliptic equations

Proceedings of the London Mathematical Society, Volume 133, Issue 1, July 2026.
Abstract We prove the uniqueness and nondegeneracy of the critical point of positive, semistable solutions of −Δu=f(u)$-\Delta u=f(u)$ with Dirichlet boundary conditions for a class of star‐shaped domains on the sphere and in the hyperbolic plane satisfying a geometric condition.
Francesca Gladiali, Massimo Grossi, Luigi Provenzano   +2 more
wiley   +1 more source

Propagation-induced Frequency-dependent Polarization Properties of Fast Radio Burst

The Astrophysical Journal
Frequency-dependent polarization properties provide crucial insights into the radiation mechanisms and magnetic environments of fast radio bursts (FRBs).
Wei-Yang Wang, Xiaohui Liu, Dongzi Li, Bing Zhang, Chen-Hui Niu, Jifeng Liu, Renxin Xu, Weiwei Zhu, Kejia Lee   +8 more
doaj   +1 more source

Fine-structure mapping of structured Laguerre-Gaussian beam states on the orbital Poincaré sphere

Компьютерная оптика
Elements of a 4D symplectic matrix P of second-order intensity moments are theoretically found and experimentally measured for paraxial structured Laguerre-Gaussian (sLG) beams with two control parameters—the amplitude e and phaseq. It is shown that only
A.V. Volyar, E.G. Abramochkin, M.V. Bretsko   +2 more
doaj   +1 more source

Higher body‐mass index modifies time‐resolved maternal autonomic cardiac–uterine coupling during the first stage of human labour

Experimental Physiology, Volume 111, Issue 7, Page 3203-3215, 1 July 2026.
Abstract We investigated whether higher body mass index (BMI) modifies time‐resolved maternal autonomic control and maternal cardio‐electrohysterographic coupling (MCEC) during the first stage of labour. Seventy‐nine women were studied and, for the present analysis, grouped as Control (C; n = 41) and high BMI (HBMI; n = 38).
Carlos Gabriel Varela‐Albarrán, José Javier Reyes‐Lagos, Laura Mercedes Santiago‐Fuentes, Guadalupe Dorantes‐Méndez, Eric Alonso Abarca‐Castro, Paula Romina Soria, Araceli Espinosa‐Guerrero   +6 more
wiley   +1 more source