scientific article; zbMATH DE number 7366167
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Publication:4995920
DOI10.3969/J.ISSN.1001-8735.2021.01.001zbMath1474.47076MaRDI QIDQ4995920
Publication date: 1 July 2021
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Completeness of eigenfunctions and eigenfunction expansions in context of PDEs (35P10) Numerical range, numerical radius (47A12) Operators arising in mathematical physics (47B93)
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