Exact results for two-dimensional coarsening J. J. Arenzon, A. J. Bray, L. F. Cugliandolo and A. Sicilia Eur. Phys. J. B, 64 3-4 (2008) 403-407 Published online: 18 January 2008 DOI: 10.1140/epjb/e2008-00020-6