Corrigendum to: Elliptic Boundary Value Problems with Fractional Regularity Data: The First Order Approach

The preliminary material of the monograph (arXiv:1607.03852) written by the first two authors contains two major imprecisions that necessitates a number of (in the end harmless) changes throughout the entire text. One is about identification of abstract and concrete Hardy spaces for perturbed Dirac operators, the other one about interpolation of quasi-Banach function spaces. Since these erroneous statements are not unlikely to spread, we provide a detailed corrigendum, including further background and corrected statements for all affected results. All other results remain unchanged.