Connecting Classical and Abstract Theory of Friedrichs Systems via Trace Operator

Abstract EN

Based on recent progress in understanding the abstract setting for Friedrichs symmetric positive systems by Ern et al.

(2007), as well as Antonić and Burazin (2010), we continue our efforts to relate these results to the classical Friedrichs theory.

Following the approach via the trace operator, we extend the results of Antonić and Burazin (2011) to situations where the important boundary field does not consist only of projections, allowing the treatment of hyperbolic equations, besides the elliptic ones.