Results 41 to 50 of about 2,994 (165)

Fat equator effect and minimality in immersions and submersions of the sphere

open access: yesTransactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.
Abstract Inspired by the equatorial concentration of measure phenomenon in the sphere, a result which is deduced from the general (and intrinsic), concentration of measure in Sn(1)$\mathbb {S}^n(1)$, we describe in this paper an equatorial concentration of measure satisfied by the closed (compact without boundary), isometric and minimal immersions x:Σm→
Vicent Gimeno i Garcia, Vicente Palmer
wiley   +1 more source

Crossing estimates for the Ising model on general s‐embeddings

open access: yesProceedings of the London Mathematical Society, Volume 131, Issue 4, October 2025.
Abstract We prove Russo–Seymour–Welsh‐type crossing estimates for the FK–Ising model on general s‐embeddings whose origami map has an asymptotic Lipschitz constant strictly smaller than 1, provided it satisfies a mild non‐degeneracy assumption. This result extends the work of Chelkak and provides a general framework to prove that the usual connection ...
Rémy Mahfouf
wiley   +1 more source

Asymptotic Analysis of Stokes Flow Through a Filter

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 13, Page 12913-12934, September 2025.
ABSTRACT This paper investigates the Stokes flow through a thin porous layer composed of a rigid, thin, periodic, and closely packed array of parallel long rods with a noncircular, anisotropic cross‐section in the shape of a slot. This shape allows for the construction of a thicker permeable filter than what is known as the Brinkman critical size.
Georges Griso   +2 more
wiley   +1 more source

Delay-Dependent Stability Analysis of Load Frequency Control for Power System With EV Aggregator

open access: yesFrontiers in Energy Research, 2021
In this paper, the stability of load frequency control (LFC) for delayed power systems with an electric vehicle (EV) aggregator is studied based on Lyapunov theory and linear matrix inequalities (LMIs).
Zhe-Li Yuan   +11 more
doaj   +1 more source

Homogeneous Multigrid for Hybrid Discretizations: Application to HHO Methods

open access: yesNumerical Methods for Partial Differential Equations, Volume 41, Issue 5, September 2025.
ABSTRACT We prove the uniform convergence of the geometric multigrid V‐cycle for hybrid high‐order (HHO) and other discontinuous skeletal methods. Our results generalize previously established results for HDG methods, and our multigrid method uses standard smoothers and local solvers that are bounded, convergent, and consistent.
Daniele A. Di Pietro   +4 more
wiley   +1 more source

On the Influence of the Fiber Curvature on the Stiffness of Long Fiber Reinforced Composites

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 126, Issue 15, 15 August 2025.
ABSTRACT The degree of curvature of fiber inclusions in fiber‐reinforced composites impacts the elastic properties of the composite, but numerical studies of this effect are limited by the lack of efficient microstructure generators with fiber curvature control. We propose an extension to the fused Sequential Addition and Migration algorithm (Int.
Celine Lauff   +3 more
wiley   +1 more source

H∞ performance for load frequency control systems with random delays

open access: yesSystems Science & Control Engineering, 2021
This paper investigates the problem of $ {H_\infty } $ performance analysis for PI-type load frequency control (LFC) of power systems with random delays.
Nan Wang, Wei Qian, Xiaozhuo Xu
doaj   +1 more source

Finite-Time Mixed H/Passivity for Neural Networks With Mixed Interval Time-Varying Delays Using the Multiple Integral Lyapunov-Krasovskii Functional

open access: yesIEEE Access, 2021
In this article, we consider the finite-time mixed $H_{\infty }$ /passivity, finite-time stability, and finite-time boundedness for generalized neural networks with interval distributed and discrete time-varying delays.
Chalida Phanlert   +3 more
doaj   +1 more source

Unconditional and Conditional Large Gaps between the zeros of the Riemann Zeta-Function [PDF]

open access: yes, 2010
In this paper, first by employing inequalities derived from the Opial inequality due to David Boyd with best constant, we will establish new unconditional lower bounds for the gaps between the zeros of the Riemann zeta function. Second, on the hypothesis
Saker, S. H.
core  

On a generalized Wirtinger inequality

open access: yesDiscrete & Continuous Dynamical Systems - A, 2003
In this article we discuss a generalized Wirtinger inequality.
Croce, Gisella, Dacorogna, Bernard
openaire   +2 more sources

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