Results 61 to 70 of about 16,140 (179)
Spectral Resolution of the Neumann–Poincaré Operator on Intersecting Disks and Analysis of Plasmon Resonance [PDF]
Archive for Rational Mechanics and Analysis, 2017 The purpose of this paper is to investigate the spectral nature of the Neumann-Poincaré operator on the intersecting disks, which is a domain with the Lipschitz boundary. The complete spectral resolution of the operator is derived, which shows in particular that it admits only the absolutely continuous spectrum, no singularly continuous spectrum and no
Kang, Hyeonbae +2 more
openaire +3 more sources
Degree theory for 4‐dimensional asymptotically conical gradient expanding solitons
Communications on Pure and Applied Mathematics, Volume 79, Issue 5, Page 1151-1298, May 2026.Abstract We develop a new degree theory for 4‐dimensional, asymptotically conical gradient expanding solitons. Our theory implies the existence of gradient expanding solitons that are asymptotic to any given cone over S3$S^3$ with non‐negative scalar curvature. We also obtain a similar existence result for cones whose link is diffeomorphic to S3/Γ$S^3/\
Richard H. Bamler, Eric Chen
wiley +1 more source
Generalized Second Bargmann Transforms Associated with the Hyperbolic Landau Levels on the Poincaré Disk [PDF]
Annales Henri Poincaré, 2011 We deal with a family of generalized coherent states associated to the hyperbolic Landau levels of the Schrödinger operator with uniform magnetic field on the Poincaré disk. Their associated coherent state transforms constitute a class of generalized second Bargmann transforms.
El Wassouli, Fouzia +3 more
openaire +3 more sources
A Conceptual Framework for Assessing Soil Structural Attributes Across Contrasting Land‐Use Types
European Journal of Soil Science, Volume 77, Issue 3, May–June 2026.ABSTRACT Soil structure governs ecosystem functioning across scales, but its complexity requires integrative approaches that capture geometric and functional properties. This study proposes a methodological framework that integrates field‐based visual evaluation of soil structure (VESS), X‐ray computed tomography (CT) and soil hydraulic property (SHP ...
Niklas Schmücker +4 more
wiley +1 more source
Transcendental Equations for Nonlinear Optimization in Hyperbolic Space
Engineering ProceedingsWe present a novel application of transcendental equations for nonlinear distance optimization in hyperbolic space. Through asymptotic approximations using Fourier and Taylor series expansions, we obtain approximations for the transcendental equations ...
Pranav Kulkarni, Harmanjot Singh
doaj +1 more source
Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
Searching for ribbons with machine learning
Machine Learning: Science and TechnologyWe apply Bayesian optimization and reinforcement learning to a problem in topology: the question of when a knot bounds a ribbon disk. This question is relevant in an approach to disproving the four-dimensional smooth Poincaré conjecture; using our ...
Sergei Gukov +3 more
doaj +1 more source
MathematicsWe study the phase-space dynamics of quantum systems with SU(1,1) group symmetry using coherent-state representations on the Poincaré disk. The resulting evolution equation combines transport terms with nonlocal contributions generated with the spectral ...
Rodrigo D. Aceves +2 more
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Nonlinear Dynamic Analysis of Rotor Rub-Impact System
Shock and Vibration, 2019 A dynamic model of a double-disk rub-impact rotor-bearing system with rubbing fault is established. The dynamic differential equation of the system is solved by combining the numerical integration method with MATLAB.
Youfeng Zhu +5 more
doaj +1 more source
Dynamical Monte Carlo Simulations of 3-D Galactic Systems in Axisymmetric and Triaxial Potentials
, 2017 We describe the dynamical behavior of isolated old (> 1 G yr) objects-like Neutron Stars (NSs). These isolated NSs are evolved under smooth, time-independent, 3-D gravitational potentials, axisymmetric and with a triaxial dark halo.
Taani, Ali, Vallejo, Juan C.
core +1 more source