H. Langer

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Articles: 2

Continuations of Hermitian indefinite functions and corresponding canonical systems: an example

Heinz Langer, Matthias Langer, Zoltán Sasvári

Methods Funct. Anal. Topology 10 (2004), no. 1, 39-53

A self-adjoint linear pencil $Q-\lambda P$ of ordinary differential operators

Heinz Langer, Reinhard Mennicken, Christiane Tretter

Methods Funct. Anal. Topology 2 (1996), no. 1, 38-54

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