Results 21 to 30 of about 8,269,907 (85)

Correlation functions of the One-Dimensional Random Field Ising Model at Zero Temperature

open access: yes, 1993
We consider the one-dimensional random field Ising model, where the spin-spin coupling, $J$, is ferromagnetic and the external field is chosen to be $+h$ with probability $p$ and $-h$ with probability $1-p$.
B. Derrida   +5 more
core   +1 more source

Resonances and Spectral Shift Function for the semi-classical Dirac operator

open access: yes, 2006
We consider the self-adjoint operator $H=H_0+V$, where $H_0$ is the free semi-classical Dirac operator on $R^3$. We suppose that the smooth matrix-valued potential $V=O(^{-\delta}), \delta>0,$ has an analytic continuation in a complex sector outside a ...
Khochman, Abdallah
core   +2 more sources

Symmetrically approximately continuous functions, consistent density theorems, and Fubini type inequalities [PDF]

open access: yes, 2005
Using the continuum hypothesis, Sierpinski constructed a non-measurable function f such that {h : f( x + h) not equal f(x - h)} is countable for every x: Clearly, such a function is symmetrically approximately continuous everywhere.Here we to show that ...
Humke, PD, Laczkovich, M
core  

Sum Rules for Nucleon GPDs and Border Function Formulation

open access: yes, 2013
The newy developed approach to model nucleon generalized parton distributions (GPDs) H and E$ is based on two types of their representation in terms of double distributions.
Radyushkin, A. V.
core   +1 more source

On the period function of Newtonian systems [PDF]

open access: yes, 2013
We study the existence of centers of planar autonomous system of the form $$(S) \quad \dot x=y,\qquad \dot y = -h(x) - g(x)y - f(x)y^2.$$ We are interested in the period function $T$ around a center 0. A sufficient condition for the isochronicity of (
Chouikha, A. Raouf, Timoumi, Mohsen
core   +1 more source

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