ResearchBenchmarksVariable-coefficient Poisson equation (All-Dirichlet BCs) (C2)Variable-coefficient Poisson equation (All-Dirichlet BCs) (C2)Follow3.82Relative L2 ErrorNPSolver2.80929.632116.45523.2779May 25, 2026Evaluation resultsMethodMethodLinksRelative L2 ErrorNPSolver2026.053.82PINO2026.0529.09