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Publication:3338669
zbMath0547.35089MaRDI QIDQ3338669
Publication date: 1984
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
General topics in linear spectral theory for PDEs (35P05) Completeness of eigenfunctions and eigenfunction expansions in context of PDEs (35P10) Spectral sets of linear operators (47A25) Partial differential equations of mixed type and mixed-type systems of partial differential equations (35M99)
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