Figure 8From: An optimized SPDMFE extrapolation approach based on the POD technique for 2D viscoelastic wave equation When \(\pmb{t=2}\) , the relative errors between solutions of Problem V with different number of POD bases for a group of 20 snapshots and the classical SPDMFE formulation Problem IV with piecewise first degree polynomial polynomials and piecewise first degree vectors. Back to article page