Superconvergent patch recovery of finite-element solution and a posteriori L2 norm error estimate

A posteriori error estimation for finite

A posteriori error estimation for finite element solutions of Helmholtz’ equation. part I: the quality of local indicators and estimators

✍ I. Babuška; F. Ihlenburg; T. Strouboulis; S. K. Gangaraj 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 271 KB 👁 3 views

This paper contains a first systematic analysis of a posteriori estimation for finite element solutions of the Helmholtz equation. In this first part, it is shown that the standard a posteriori estimates, based only on local computations, severely underestimate the exact error for the classes of wav