“…The theoretical foundations of the subject were established in [16,17,10,33,11]. This active area of research has been successfully employed to problems in linear elasticity [38,29], time harmonic wave propagation, including DPG versions of perfectly matched layers (PMLs) [54,62], compressible and incompressible Navier-Stokes [25,23,12,24], fluid flow [39], viscoelasticity [27] and space-time formulations [20,35,25,22]. Moreover, versions of DPG for polygonal meshes have been introduced in [61].…”