Abstract
The aim of this paper is two-folds. Firstly we study first order stationary systems of PDEs of the form \(\sum _k A_k\partial _k U + KU=0\) with \(K\ngtr 0\) on \(\mathbb {R}^d\). We prove that the classical assumption \(K>0\) is not necessary for the well-posedness of the system and is violated in the particular case of the first order Poisson problem. Secondly we prove the \(L^2\) stability of the finite volume discretisations provided the term KU is appropriately discretised on faces. Our result relies on a discrete Gagliardo-Nirenberg-Sobolev inequality to be submitted [15].
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Ndjinga, M., Ngwamou, S.K. (2020). On the \(L^2\) Stability of Finite Volumes for Stationary First Order Systems. In: Klöfkorn, R., Keilegavlen, E., Radu, F.A., Fuhrmann, J. (eds) Finite Volumes for Complex Applications IX - Methods, Theoretical Aspects, Examples. FVCA 2020. Springer Proceedings in Mathematics & Statistics, vol 323. Springer, Cham. https://doi.org/10.1007/978-3-030-43651-3_38
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