A boundary-operator formulation with least-squares reconstruction enables compact, well-conditioned ghost-point discretizations that preserve high-order accuracy for unfitted-domain PDEs.
A Comparison of the Coco-Russo Scheme and ghost-FEM for elliptic Equations in Arbitrary Domains
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Efficient and well-conditioned ghost-point discretization of boundary operators on unfitted domains
A boundary-operator formulation with least-squares reconstruction enables compact, well-conditioned ghost-point discretizations that preserve high-order accuracy for unfitted-domain PDEs.