主 题： Table of Contents, Communications in Math. Sci. 7-2 June 2009

Regular Articles

* On one version of a semidiscrete Galerkin method for PDE problems
involving a generalized 2D Hamiltonian operator
by Jean-Francois Berger, Bernard Ducomet, Heloise Goutte, and
Alexander Zlotnik

* A simple proof of the Cucker-Smale flocking dynamics and mean-field limit
by Seung-Yeal Ha and Jian-Guo Liu

* A fast directional algorithm for high frequency acoustic scattering
in two dimensions
by Bjorn Engquist and Lexing Ying

* Evaluation of scattering operators for semi-infinite periodic arrays
by Matthias Ehrhardt, Jiguang Sun, and Chunxiong Zheng

* Fast interface tracking via a multiresolution representation of curves
and surfaces
by Olof Runborg

* Global properties of the solutions to the Einstein-Boltzmann system
with cosmological constant in the Robertson-Walker space-time
by Etienne Takou

* Uniqueness of weak solutions to a model of electro-kinetic fluid
by Jishan Fan and Hongjun Gao

* Extrapolation of vector fields using the infinity Laplacian and with
applications to image segmentation
by Carole Le Guyader and Laurence Guillot

* Emergence of time-asymptotic flocking in a stochastic Cucker-Smale system
by Seung-Yeal Ha, Kiseop Lee, and Doron Levy

* About the link between the detailed description of transitions in an ion
and the average-ion models
by Guido Cavallaro, Laurent Desvillettes, and Valeria Ricci

* A non-standard evolution problem arising in population genetics
by Fabio A.C.C. Chalub and Max O. Souza

Fast Communications

* Exponential decay for the growth-fragmentation/cell-division equations
by Philippe Laurencot and Benoit Perthame

* A generalization of the three-dimensional MacPherson-Srolovitz formula
by Thinh Le and Qiang Du