Structure preserving model reduction of low frequency electromagnetic problem based on POD and DEIM

The Proper Orthogonal Decomposition (POD) combined with the (Discrete) Empirical Interpolation Method (DEIM) can be used to speed up the solution of a FE model. However, it can lead to numerical instabilities. To increase the robustness, the POD_DEIM model must be constructed by preserving the structure of the full FE model. In this communication, the structure preserving is applied for different potential formulations used to solve electromagnetic problems.