The smallest eigenvalue of finite element stiffness matrices is bounded below by a patch-volume expression that requires no mesh regularity assumptions, improving on Graham-McLean and Kamenski-Huang-Xu bounds.
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Sharp bounds on the smallest eigenvalue of finite element equations with arbitrary meshes without regularity assumptions
The smallest eigenvalue of finite element stiffness matrices is bounded below by a patch-volume expression that requires no mesh regularity assumptions, improving on Graham-McLean and Kamenski-Huang-Xu bounds.