A stabilizer-free weak Galerkin scheme for biharmonic equations on non-convex polytopal meshes is proposed, but the norm-equivalence proof contains a degree mismatch that undermines the stated estimates.
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Simplified Weak Galerkin Finite Element Methods for Biharmonic Equations on Non-Convex Polytopal Meshes
A stabilizer-free weak Galerkin scheme for biharmonic equations on non-convex polytopal meshes is proposed, but the norm-equivalence proof contains a degree mismatch that undermines the stated estimates.