Volume 2, No. 4 (2008)
Groups, Geometry, and Dynamics

pp. 481–498 Finiteness of arithmetic hyperbolic reflection groupsIan AgolMikhail BelolipetskyPeter StormKevin Whyte
pp. 499–593 Entropy and isoperimetry for linear and non-linear group actionsMisha Gromov
pp. 595–617 Uniform non-amenability, cost, and the first -Betti numberRussell LyonsMikaël PichotStéphane Vassout