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Aproximadamente 17 registro(s) hasta el momento: (journal)

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Recurso libre

A Note on Limiting Behaviour of Disastrous Environment Exponents
Mountford, Thomas S.; University of California, Los Angeles

Formato:	Peer-reviewed Article,
Enlaces:	We consider a random walk on the $d$-dimensional lattice and investigate the asymptotic probability of the walk avoiding a "disaster" (points put down according to a regular Poisson process on space-time). We show that, given the Poisson process points, almost…
Fecha:	2001-01-01
Recurso:	Electronic journal of probability

Recurso libre

Evolution of the interfaces in a two dimensional Potts model
Valle, Glauco; UFRJ

Formato:	Peer-reviewed Article,
Enlaces:	We investigate the evolution of the random interfaces in a two dimensional Potts model at zero temperature under Glauber dynamics for some particular initial conditions. We prove that under space-time diffusive scaling the shape of the interfaces converges in probability…
Fecha:	2007-01-01
Recurso:	Electronic journal of probability

Recurso libre

Local Energy Statistics in Directed Polymers
Kurkova, Irina; Université de Paris VI (Pierre et Marie Curie), France

Formato:	Peer-reviewed Article,
Enlaces:	Recently, Bauke and Mertens conjectured that the local statistics of energies in random spin systems with discrete spin space should, in most circumstances, be the same as in the random energy model. We show that this conjecture holds true as…
Fecha:	2008-01-01
Recurso:	Electronic journal of probability

Recurso libre

Erdos-Renyi random graphs + forest fires = self-organized criticality
Rath, Balazs; Budapest University of Technology - Toth, Balint; Budapest University of Technology

Formato:	Peer-reviewed Article,
Enlaces:	We modify the usual Erdos-Renyi random graph evolution by letting connected clusters 'burn down' (i.e. fall apart to disconnected single sites) due to a Poisson flow of lightnings. In a range of the intensity of rate of lightnings the system…
Fecha:	2009-01-01
Recurso:	Electronic journal of probability

Recurso libre

Truncated correlations in the stirring process with births and deaths
De Masi, Anna; Università di L'Aquila - Presutti, Errico; Università di Roma ''Tor Vergata'' - Tsagkarogiannis, Dimitrios; Università di Roma ''Tor Vergata'' - Vares, Maria Eulalia; Centro Brasileiro de Pesquisas Fisicas

Formato:	Peer-reviewed Article
Enlaces:	We consider the stirring process in the interval $\Lambda_N:=[-N,N]$ of $\mathbb Z$ with births and deaths taking place in the intervals $I_+:=(N-K,N]$, and respectively $I_-:=[-N,-N+K)$, $1 \le K <N$. We prove bounds on the truncated moments uniform in $N$ which…
Fecha:	2012-01-01
Recurso:	Electronic journal of probability

Recurso libre

A clever (self-repelling) burglar
Dumaz, Laure; École Normale Supérieure, Université Paris-Sud, BME Budapest

Formato:	Peer-reviewed Article
Enlaces:	We derive the following property of the "true self-repelling motion", a continuous real-valued self-interacting process $(X_t, t \ge 0)$ introduced by Balint Toth and Wendelin Werner. Conditionally on its occupation time measure at time one (which is the information about…
Fecha:	2012-01-01
Recurso:	Electronic journal of probability

Recurso libre

Lower bound estimate of the spectral gap for simple exclusion process with degenerate rates
Nagahata, Yukio; Niigata University

Formato:	Peer-reviewed Article
Enlaces:	We consider exclusion process with degenerate rates in a finite torus with size $n$. This model is a simplified model for some peculiar phenomena of the "glassy" dynamics. We prove that the spectral gap is bounded below by $C\rho^4/n^2$, where $\rho =…
Fecha:	2012-01-01
Recurso:	Electronic journal of probability

Recurso libre

Percolation Times in Two-Dimensional Models For Excitable Media
Gravner, Janko; University of California, Davis

Formato:	Peer-reviewed Article,
Enlaces:	The three-color Greenberg--Hastings model (GHM) is a simple cellular automaton model for an excitable medium. Each site on the lattice $Z^2$ is initially assigned one of the states 0, 1 or 2. At each tick of a discrete--time clock, the…
Fecha:	1996-01-01
Recurso:	Electronic journal of probability

Recurso libre

The Longtime Behavior of Branching Random Walk in a Catalytic Medium
Greven, Andreas; Universitat Erlangen-Nurnberg - Klenke, Achim; Universität Erlangen - Nürnberg - Wakolbinger, Anton; Johann Wolfgang Goethe-Universität

Formato:	Peer-reviewed Article,
Enlaces:	Consider a countable collection of particles located on a countable group, performing a critical branching random walk where the branching rate of a particle is given by a random medium fluctuating both in space and time. Here we study the…
Fecha:	1999-01-01
Recurso:	Electronic journal of probability

Recurso libre

10.

Renormalizations of Branching Random Walks in Equilibrium
Zähle, Iljana; Universität Erlangen-Nürnberg

Formato:	Peer-reviewed Article,
Enlaces:	We study the $d$-dimensional branching random walk for $d>2$. This process has extremal equilibria for every intensity. We are interested in the large space scale and large space-time scale behavior of the equilibrium state. We show that the fluctuations of…
Fecha:	2002-01-01
Recurso:	Electronic journal of probability

Recurso libre

11.

Asymptotics of Certain Coagulation-Fragmentation Processes and Invariant Poisson-Dirichlet Measures
Mayer-Wolf, Eddy; Technion - Zeitouni, Ofer; Technion - Zerner, Martin P.W.; Stanford University

Formato:	Peer-reviewed Article,
Enlaces:	We consider Markov chains on the space of (countable) partitions of the interval $[0,1]$, obtained first by size biased sampling twice (allowing repetitions) and then merging the parts with probability $\beta_m$ (if the sampled parts are distinct) or splitting the…
Fecha:	2002-01-01
Recurso:	Electronic journal of probability

Recurso libre

12.

Central Limit Theorem for a Class of Linear Systems
Nagahata, Yukio; Osaka University - Yoshida, Nobuo; Kyoto University

Formato:	Peer-reviewed Article,
Enlaces:	We consider a class of interacting particle systems with values in $[0,∞)^{\mathbb{Z}^d}$, of which the binary contact path process is an example. For $d \geq 3$ and under a certain square integrability condition on the total number of the particles,…
Fecha:	2009-01-01
Recurso:	Electronic journal of probability

Recurso libre

13.

Stochastic Domination for the Ising and Fuzzy Potts Models
Warfheimer, Marcus; Chalmers University of Technology and University of Gothenburg

Formato:	Peer-reviewed Article,
Enlaces:	We discuss various aspects concerning stochastic domination for the Ising model and the fuzzy Potts model. We begin by considering the Ising model on the homogeneous tree of degree $d$, $\mathbb{T}^d$. For given interaction parameters $J_1$, $J_2>0$ and external field…
Fecha:	2010-01-01
Recurso:	Electronic journal of probability

Recurso libre

14.

Multitype Contact Process on Z: Extinction and Interface
Valesin, Daniel; École Polytechnique Fédérale de Lausanne

Formato:	Peer-reviewed Article,
Enlaces:	We consider a two-type contact process on the integers. Both types have equal finite range and supercritical infection rate. We show that a given type becomes extinct with probability 1 if and only if, in the initial configuration, it is…
Fecha:	2010-01-01
Recurso:	Electronic journal of probability

Recurso libre

15.

Self-Interacting Diffusions IV: Rate of Convergence
Benaïm, Michel; Université de Neuchâtel - Raimond, Olivier; Université Paris Ouest

Formato:	Peer-reviewed Article,
Enlaces:	Self-interacting diffusions are processes living on a compact Riemannian manifold defined by a stochastic differential equation with a drift term depending on the past empirical measure of the process. The asymptotics of this measure is governed by a deterministic dynamical…
Fecha:	2011-01-01
Recurso:	Electronic journal of probability

Recurso libre

16.

Distribution of components in the k-nearest neighbour random geometric graph for k below the connectivity threshold
Falgas-Ravry, Victor; Umeå Universitet

Formato:	Peer-reviewed Article
Enlaces:	Let $S_{n,k}$ denote the random geometric graph obtained by placing points inside a square of area $n$ according to a Poisson point process of intensity $1$ and joining each such point to the $k=k(n)$ points of the process nearest to…
Fecha:	2013-01-04
Recurso:	Electronic journal of probability

Recurso libre

17.

The Time Constant Vanishes Only on the Percolation Cone in Directed First Passage Percolation
Zhang, Yu; University of Colorado

Formato:	Peer-reviewed Article,
Enlaces:	We consider the directed first passage percolation model on $\mathbb{Z}^2$. In this model, we assign independently to each edge $e$ a passage time $t(e)$ with a common distribution $F$. We denote by $\vec{T}(0,(r,\theta))$ the passage time from the origin to…
Fecha:	2009-01-01
Recurso:	Electronic journal of probability