Establishes an Aubin-Nitsche lemma and optimal L2 error bound for a positivity-preserving FEM on elliptic PDEs via a custom linearised adjoint.
A nodal based a posteriori error estimator preserving the positivity for a singularly perturbed reaction-diffusion problem , volume =
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An Aubin-Nitsche Lemma for a positivity-preserving finite element method
Establishes an Aubin-Nitsche lemma and optimal L2 error bound for a positivity-preserving FEM on elliptic PDEs via a custom linearised adjoint.