Compressible flow 2 Artificial speed of sound 1 Convergence of numerical methods 1 Density gradients 1 Domain decomposition methods 1 Entropy 1 Entropy conditions 1 Euler equations 1 Euler's equation 1 Extended physic-informed neural network 1 Extended physics-informed neural networks 1 Flow problems 1 Governing equations 1 High Speed 1 Inverse problems 1 Low speed flow 1 Low-speed flow 1 Navier Stokes equations 1 Navier-Stokes equations 1 Neural-networks 1 Precondition method 1 Pseudo High Speed (SHS) 1 Pseudo high speed (SHS) 1 SHS method 1 Schlieren photography 1 Shock waves 1 Simple++ 1 Speed 1 Speeds of sound 1 Subdomain 1