Figure 6From: A reduced-order extrapolating collocation spectral method based on POD for the 2D Sobolev equations(a) The error between the CS solution and the analytical solution solution when \(t=0.9\); (b) the error between the ROECS solution and the analytical solution solution when \(t=0.9\); (c) the error between the ROECS solution and the CS solution when \(t=0.9\)Back to article page