# Mathematics Colloquia and Seminars

Late time coarsening has been observed in epitaxial growth models. Results from experiments and numerics on isotropic epitaxial growth models suggest that the characteristic length scale $L(t)$ grows as $t^{\frac{1}{3}}$ at late times. We prove a weak one sided version of this statement. Our analysis follows a strategy introduce by Kohn and Otto in their study of phase transition.