Results 121 to 130 of about 548,689 (195)

Topological and geometric rigidity of nonnegatively curved submanifolds

Bulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.
Abstract We investigate the topology and geometry of compact submanifolds in space forms of nonnegative curvature satisfying a lower bound on the sectional curvature that depends only on the length of the mean curvature vector of the immersion. We show that this condition imposes strong constraints on either the topology or geometry of the submanifold.
Theodoros Vlachos
wiley   +1 more source

Geometric spectral properties of electromagnetic waveguides

Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.
Abstract We consider a homogeneous, isotropic electromagnetic waveguide with simply connected cross‐section embedded in a perfect conductor. We investigate the influence of geometric deformations, namely bending and twisting, on the real spectrum of the associated self‐adjoint Maxwell operator. We first establish sufficient conditions on the asymptotic
Philippe Briet, Maxence Cassier, Thomas Ourmières‐Bonafos, Michele Zaccaron   +3 more
wiley   +1 more source

Mixed motives and linear forms in the Catalan constant

Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.
Abstract We first give a geometric construction of a two‐dimensional mixed motive over Q${\mathbb {Q}}$ with the Catalan constant G=1−1/32+1/52−1/72+⋯${\mathbf {G}}=1-1/3^2+1/5^2-1/7^2+\cdots$ as a period. We then use this motive to obtain a supply of linear forms in 1 and G${\mathbf {G}}$.
Payman Eskandari, V. Kumar Murty, Yusuke Nemoto   +2 more
wiley   +1 more source

The Poincaré—Mittag-Leffler Relationship

, 1999
International audiencePrésentation de la correspondance entre Henri Poincaré et Gösta Mittag ...
Nabonnand, Philippe
core   +1 more source

Optimal bounds for the Kobayashi distance near C2$\mathcal {C}^2$‐smooth boundary points

Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.
Abstract It is shown that the optimal upper and lower bounds for the Kobayashi distance near C2,α$\mathcal {C}^{2,\alpha }$‐smooth strongly pseudoconvex boundary points obtained in Kosiński, Nikolov, and Ökten [Adv. Math. 478 (2025), 110388] remain true in the general C2$\mathcal {C}^2$‐smooth strongly pseudoconvex setting.
Nikolai Nikolov, Pascal J. Thomas
wiley   +1 more source

Complementary legs and symplectic rational balls

Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.
Abstract We show that a small Seifert fibered space with complementary legs does not symplectically bound a rational homology ball for at least one choice of orientation. In the case e0⩽−1$e_0\leqslant -1$, we characterize when a small Seifert fibered space with uniquely complementary legs symplectically bounds a rational homology ball.
John B. Etnyre, Burak Ozbagci, Bülent Tosun   +2 more
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

On the detection of knots by their traces in high dimensions

Proceedings of the London Mathematical Society, Volume 133, Issue 4, October 2026.
Abstract For every n⩾4$n\geqslant 4$, we demonstrate the existence of non‐isotopic, smooth (n−2)$(n-2)$‐knots in Sn$S^n$ with diffeomorphic traces. We give two proofs: the first by generalising the RBG link construction to all dimensions, and the second as an application of work of Plotnick.
Valentina Bais, Alessio Di Prisa, Daniel Hartman, Chun‐Sheng Hsueh, Marc Kegel, Alice Merz, Mark Pencovitch, Arunima Ray, Diego Santoro, Paula Truöl, Laura Wakelin   +10 more
wiley   +1 more source

The Jones vector as a spinor and its representation on the Poincaré sphere

, 2017
Se muestra que las dos componentes Cartesianas complejas del campo eléctrico de una onda plana electromágnetica monocromática, con dependencia temporal y espacial de la forma ei(kz-wt), forma un espinor SU(2) que corresponde al vector tangente a la ...
Rubalcava García, I., Torres del Castillo, Gerardo F.   +1 more
core  

Modelling the time‐resolved modulations of cardiac activity in rats: A study on pharmacological autonomic stimulation

The Journal of Physiology, Volume 604, Issue 19, Page 8100-8111, 1 October 2026.
Abstract figure legend Time‐resolved estimation of cardiac rhythmicity parameters. A pipeline is shown for the estimation of the fluctuating cardiac parameters, based on the Poincaré plot. The Poincaré plot illustrates the successive changes in interbeat intervals (IBI).
Diego Candia‐Rivera, Sofia Carrion‐Falgarona, Fabrizio de Vico Fallani, Mario Chavez   +3 more
wiley   +1 more source