scientific article
zbMath0542.47011MaRDI QIDQ3329978
Publication date: 1983
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fredholm operatorseigenfunction expansionsJordan chainsoperator polynomialboundary value problems of ordinary linear differential systems of the first orderexistence of biorthogonal systems of eigenvectors
General theory of ordinary differential operators (47E05) Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones) (47A56) (Semi-) Fredholm operators; index theories (47A53) Linear boundary value problems for ordinary differential equations (34B05) (Generalized) eigenfunction expansions of linear operators; rigged Hilbert spaces (47A70)
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