Toprakseven, Şuayip2020-06-262020-06-262020Toprakseven, Ş. (2020). AA space-time discontinuous galerkin method for linear hyperbolic PDE's with high frequencies. Communications Series A1 Mathematics & Statistics, 69(1), 213-231.doi:10.31801/cfsuasmas.544522.https://hdl.handle.net/11494/2123The main purpose of this paper is to describe a space-time discontinuous Galerkin (DG) method based on an extended space-time approximation space for the linear Örst order hyperbolic equation that contains a high frequency component. We extend the space-time DG spaces of tensorproduct of polynomials by adding trigonometric functions in space and time that capture the oscillatory behavior of the solution. We construct the method by combining the basic framework of the space-time DG method with the extended Önite element method. The basic principle of the method is integrating the features of the partial di§erential equation with the standard space-time spaces in the approximation. We present error analysis of the proposed spacetime DG method for the linear Örst order hyperbolic problems. We show that the new space-time DG approximation has an improvement in the convergence compared to the space-time DG schemes with tensor-product polynomials. Numerical examples verify the theoretical Öndings and demonstrate the e§ects of the proposed method.eninfo:eu-repo/semantics/openAccessAttribution 3.0 United StatesDiscontinuous Galerkin Önite element methodsSpace-time discontinuous Galerkin methodsHyperbolic problemsHigh frequency solutionsArticle69121323110.31801/cfsuasmas.544522N/A