Eric Clark focused on improving the stability and correctness of the RZ vector Laplacian in the WarpX repository, specifically for simulations using cylindrical coordinates. He addressed a critical division-by-zero issue at the coordinate origin by implementing origin-aware handling and ensuring proper application of hyper-resistivity. This fix reduced numerical artifacts and improved simulation reliability and accuracy, particularly at the origin where such errors are most pronounced. Eric’s work involved C++ and applied numerical methods in scientific computing, demonstrating careful attention to simulation edge cases. He collaborated closely with peers, contributing code that enhanced the robustness of WarpX’s cylindrical-coordinate evaluations.