A posteriori error estimates for a finite element approximation of transmission problems with sign changing coefficients
Provides error estimation for a specific class of PDE problems with sign-changing coefficients, extending prior work to discrete settings.
The paper develops a posteriori error estimates for finite element approximations of transmission problems with sign-changing coefficients, proving reliability and efficiency through numerical tests.
We perform the a posteriori error analysis of residual type of a transmission problem with sign changing coefficients. According to [6] if the contrast is large enough, the continuous problem can be transformed into a coercive one. We further show that a similar property holds for the discrete problem for any regular meshes, extending the framework from [6]. The reliability and efficiency of the proposed estimator is confirmed by some numerical tests.