Kevin Campbell

most citedOn the spectral theory for first-order systems without the unique continuation property

8 citations · 8 across the 2 of their papers we have counts for

collaborators

2 papers

math.SP2023

On the spectral theory of systems of first order equations with periodic distributional coefficients

Kevin Campbell, Rudi Weikard

We establish a Floquet theorem for a first-order system of differential equations $u^{'} = r u$ where $r$ is an $n \times n$ -matrix whose entries are periodic distributions of order $0$ .…

math.CA2023★ 8 cited

On the spectral theory for first-order systems without the unique continuation property

Kevin Campbell, Minh Nguyen, Rudi Weikard

We consider the differential equation $J u^{'} + q u = w f$ on the real interval $(a, b)$ when $J$ is a constant, invertible skew-Hermitian matrix and $q$ and $w$ are matrices whose entries a…