Results 31 to 40 of about 428,778 (188)

Weak solutions to problems involving inviscid fluids

open access: yes, 2015
We consider an abstract functional-differential equation derived from the pressure-less Euler system with variable coefficients that includes several systems of partial differential equations arising in the fluid mechanics.
C Audiard   +14 more
core   +1 more source

A stochastic log-Laplace equation [PDF]

open access: yes, 2003
We study a nonlinear stochastic partial differential equation whose solution is the conditional log-Laplace functional of a superprocess in a random environment. We establish its existence and uniqueness by smoothing out the nonlinear term and making use
Xiong, Jie
core   +2 more sources

Invited review: KPZ. Recent developments via a variational formulation [PDF]

open access: yes, 2013
Recently, a variational approach has been introduced for the paradigmatic Kardar--Parisi--Zhang (KPZ) equation. Here we review that approach, together with the functional Taylor expansion that the KPZ nonequilibrium potential (NEP) admits. Such expansion
Deza, Roberto R.   +3 more
core   +2 more sources

Beyond Poisson-Boltzmann: Numerical sampling of charge density fluctuations [PDF]

open access: yes, 2016
We present a method aimed at sampling charge density fluctuations in Coulomb systems. The derivation follows from a functional integral representation of the partition function in terms of charge density fluctuations.
Delarue, Marc   +2 more
core   +3 more sources

On Complex Singularity Analysis for Some Linear Partial Differential Equations in

open access: yesAbstract and Applied Analysis, 2013
We investigate the existence of local holomorphic solutions Y of linear partial differential equations in three complex variables whose coefficients are holomorphic on some polydisc in outside some singular set .
A. Lastra, S. Malek, C. Stenger
doaj   +1 more source

Stochastic maximum principle for optimal control of a class of nonlinear SPDEs with dissipative drift

open access: yes, 2015
We prove a version of the stochastic maximum principle, in the sense of Pontryagin, for the finite horizon optimal control of a stochastic partial differential equation driven by an infinite dimensional additive noise.
Fuhrman, Marco, Orrieri, Carlo
core   +1 more source

Existence of weak quasi-periodic solutions for a second order Hamiltonian system with damped term via a PDE approach

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
In this paper, we investigate the existence of weak quasi-periodic solutions for the second order Hamiltonian system with damped term: \begin{equation} \ddot{u}(t)+q(t)\dot{u}(t)+D W(u(t))=0, \qquad t\in \mathbb R,\tag{HSD} \end{equation} where
Xingyong Zhang, Liben Wang
doaj   +1 more source

On the Partial Equiasymptotic Stability in Functional Differential Equations

open access: yesJournal of Mathematical Analysis and Applications, 2002
A system of functional-differential equations with delay \(dz/dt=Z(t,z_t)\), where \(Z\) is a vector-valued functional, is considered. It is supposed that this system has a zero solution \(z=0\). Definitions of its partial stability, partial asymptotical stability and partial equiasymptotical stability are given.
openaire   +2 more sources

Solutions for Functional Fully Coupled Forward-Backward Stochastic Differential Equations [PDF]

open access: yes, 2013
In this paper, we study a functional fully coupled forward-backward stochastic differential equations (FBSDEs). Under a new type of integral Lipschitz and monotonicity conditions, the existence and uniqueness of solutions for functional fully coupled ...
Ji, Shaolin, Yang, Shuzhen
core  

Nonlinear optimisation method for image segmentation and noise reduction using geometrical intrinsic properties

open access: yes, 2006
This paper considers the optimisation of a nonlinear functional for image segmentation and noise reduction. Equations optimising this functional are derived and employed to detect edges using geometrical intrinsic properties such as metric and Riemann ...
Mahmoodi, Sasan, Sharif, Bayan
core   +1 more source

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