Codice 57/2013 Titolo Schwarz domain decomposition preconditioners for plane wave discontinuous Galerkin methods Data 2013-11-17 Autore/i Antonietti, P.F.; Perugia, I.; Zaliani, D. Link Download full text Abstract We construct Schwarz domain decomposition preconditioners for plane wave discontinuous Galerkin methods for Helmholtz boundary value problems. In particular, we consider additive and multiplicative non-overlapping Schwarz methods. Numerical tests show good performance of these preconditioners when solving the linear system of equations with GMRES.