A Static Condensation Algorithm for Time-Implicit discretizations of Gauss-Lobatto Discontinuous Galerkin Spectral Element Methods - David Kopriva; RUEDA RAMíREZ, ANDRéS MAURICIO; FERRER VACCAREZZA, ESTEBAN; RUBIO CALZADO, GONZALO; VALERO SANCHEZ, EUSEBIO (North American High Order Methods Conference (Nahomc), 2019)