ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN)

On the instabilities of naive FEM discretizations for PDEs with sign-changing coefficients

Martin Halla and Florian Oberender

ESAIM: M2AN, 60 1 (2026) 197-222

Published online: 13 February 2026

DOI: 10.1051/m2an/2025102

Martin Halla

Florian Oberender

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