Quasi-Trefftz spaces for a first-order formulation of the Helmholtz equation

Published 10 Sep 2025 in math.NA and cs.NA | (2509.08936v1)

Abstract: This work is the first step in the development of quasi-Trefftz methods for first-order differential systems. It focuses on discrete quasi-Trefftz spaces, starting from their definition and including construction of corresponding bases together with their computational aspect.

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