Results 151 to 160 of about 6,786 (289)

Exponential asymptotics for time-space Hamiltonians

, 2013
We investigate the long time asymptotics of the exponential moment for the following time-space Hamiltonian ∫t0∫t01|r−s|α0γ(Br−Bs)dsdr,t≥0, where (Bs , s ≥ 0) is a d-dimensional Brownian motion and the kernel γ(x): Rd → [0, ∞) is a homogeneous function ...
Song, J
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Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

Asymptotics of Symmetric Polynomials: A Dynamical Point of View. [PDF]

Commun Math Phys
Guionnet A, Huang J.
europepmc   +1 more source

Stochastic Gradient Descent in High Dimensions for Multi‐Spiked Tensor PCA

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We study the high‐dimensional dynamics of online stochastic gradient descent (SGD) for the multi‐spiked tensor model. This multi‐index model arises from the tensor principal component analysis (PCA) problem with multiple spikes, where the goal is to estimate the unknown signal vectors within the N$N$‐dimensional unit sphere through maximum ...
Gérard Ben Arous, Cédric Gerbelot, Vanessa Piccolo   +2 more
wiley   +1 more source

Separation of Time Scales in Weakly Interacting Diffusions. [PDF]

Arch Ration Mech Anal
Adams ZP, Engel M, Gvalani RS.
europepmc   +1 more source

Linear and Two‐Dimensional Infrared Spectroscopy of the Multifunctional Vibrational Probe, 3‐(4‐Azidophenyl) Propiolonitrile. Deperturbing a Fermi Triad by Isotopic Substitution

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Linear infrared spectroscopy combined with isotope labeling and density functional theory unravels the origin of a Fermi triad in a multifunctional vibrational chromophore. Ultrafast 2DIR‐spectroscopy reports directly on the dynamics and the intramolecular vibrational energy flow pathways in the isotopically deperturbed system. Abstract Infrared probes
Claudia Gräve, Jörg Lindner, Stefan Flesch, Luis I. Domenianni, Peter Vöhringer   +4 more
wiley   +1 more source

Evolution Equations on Co-evolving Graphs: Long-Time Behaviour and the Graph-Continuity Equation. [PDF]

J Nonlinear Sci
Carrillo JA, Esposito A, Mikolás L.
europepmc   +1 more source

Tuning the Growth Pattern of Triangular Silver Nanoplates from Lateral to Vertical by Secondary Metal Addition

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
What happens, if in the synthesis of flat silver platelets, the slow deposition of silver along twinning faults is disturbed by the addition of a nobler metal? We have looked into it and found a way to fine‐tune the metal deposition in lateral and vertical direction.
Jonas Kluitmann, Andrea Csáki, Wolfgang Fritzsche, Johann Michael Köhler   +3 more
wiley   +1 more source

Response to "Treatment Outcomes with Lanadelumab Every Two Weeks and Garadacimab Are Very Similar in Patients with Hereditary Angioedema". [PDF]

Drugs R D
Samjoo IA.
europepmc   +1 more source

Invariant manifolds and the long-time asymptotics of the Navier-Stokes and vorticity equations on R²

, 2001
We construct finite-dimensional invariant manifolds in the phase space of the Navier-Stokes equation on R² and show that these manifolds control the long-time behavior of the solutions.
Thierry Gallay, C. Eugene Wayne
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