Results 11 to 20 of about 2,675,517 (69)

A remark on normal forms and the "upside-down" I-method for periodic NLS: growth of higher Sobolev norms [PDF]

open access: yes, 2011
We study growth of higher Sobolev norms of solutions to the one-dimensional periodic nonlinear Schrodinger equation (NLS). By a combination of the normal form reduction and the upside-down I-method, we establish \|u(t)\|_{H^s} \lesssim (1+|t|)^{\alpha (s-
Colliander, James   +2 more
core   +2 more sources

Complex plane representations and stationary states in cubic and quintic resonant systems

open access: yes, 2019
Weakly nonlinear energy transfer between normal modes of strongly resonant PDEs is captured by the corresponding effective resonant systems. In a previous article, we have constructed a large class of such resonant systems (with specific representatives ...
Biasi, Anxo, Bizon, Piotr, Evnin, Oleg
core   +1 more source

Solvable cubic resonant systems

open access: yes, 2019
Weakly nonlinear analysis of resonant PDEs in recent literature has generated a number of resonant systems for slow evolution of the normal mode amplitudes that possess remarkable properties.
Biasi, Anxo, Bizon, Piotr, Evnin, Oleg
core   +1 more source

Exponential decay properties of a mathematical model for a certain fluid-structure interaction

open access: yes, 2014
In this work, we derive a result of exponential stability for a coupled system of partial differential equations (PDEs) which governs a certain fluid-structure interaction.
Avalos, George, Bucci, Francesca
core   +1 more source

Local well-posedness and singularity formation in non-Newtonian compressible fluids

open access: yes, 2023
We investigate the initial value problem of a very general class of $3+1$ non-Newtonian compressible fluids in which the viscous stress tensor with shear and bulk viscosity relaxes to its Navier-Stokes values.
Disconzi, Marcelo M.   +2 more
core  

Conditional regularity of solutions of the three dimensional Navier-Stokes equations and implications for intermittency

open access: yes, 2012
Two unusual time-integral conditional regularity results are presented for the three-dimensional Navier-Stokes equations. The ideas are based on $L^{2m}$-norms of the vorticity, denoted by $\Omega_{m}(t)$, and particularly on $D_{m} = \Omega_{m}^{\alpha_{
Constantin P.   +9 more
core   +1 more source

On the probabilistic Cauchy theory for nonlinear dispersive PDEs

open access: yes, 2018
In this note, we review some of the recent developments in the well-posedness theory of nonlinear dispersive partial differential equations with random initial data.Comment: 26 pages. To appear in Landscapes of Time-Frequency Analysis, Appl.
A Choffrut   +45 more
core   +1 more source

A remark on randomization of a general function of negative regularity

open access: yes, 2023
In the study of partial differential equations (PDEs) with random initial data and singular stochastic PDEs with random forcing, we typically decompose a classically ill-defined solution map into two steps, where, in the first step, we use stochastic ...
Oh, Tadahiro   +3 more
core  

Conformal flow on $S^3$ and weak field integrability in AdS$_4$

open access: yes, 2017
We consider the conformally invariant cubic wave equation on the Einstein cylinder $\mathbb{R} \times \mathbb{S}^3$ for small rotationally symmetric initial data.
Bizoń, Piotr   +5 more
core   +1 more source

Recent results in mathematical relativity

open access: yes, 2004
We review selected recent results concerning the global structure of solutions of the vacuum Einstein equations. The topics covered include quasi-local mass, strong cosmic censorship, non-linear stability, new constructions of solutions of the constraint
Chrusciel, Piotr T.
core   +1 more source

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