ResearchBenchmarksVariable-coefficient Poisson equation (All-Dirichlet BCs) (C0)Variable-coefficient Poisson equation (All-Dirichlet BCs) (C0)Follow5.5Relative L2 ErrorNPSolver4.404811.797419.1926.5826May 25, 2026Evaluation resultsMethodMethodLinksRelative L2 ErrorNPSolver2026.055.5PINO2026.0532.88