A.V. Kuzhuget, L.Beilina, M.V. Klibanov and V.G.Romanov Global convergence and quasireversibility for a coefficient inverse problem with backscattering data (599K, pdf) ABSTRACT. A globally convergent numerical method is developed for a 2-d Coefficient Inverse Problem for a hyperbolic PDE with the backscattering data. An important part of this technique is the quasi-reversibility method. A global convergence theorem is proven via a Carleman estimate. Results of numerical experiments for the problem modeling imaging of plastic land mines are presented.