On the operator \(\Delta r^2 + \mu (\partial/\partial r) r + \lambda\)

DOI10.1016/0022-0396(74)90069-2zbMath0293.35034OpenAlexW2083271555MaRDI QIDQ1212195

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Publication date: 1974

Published in: (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0022-0396(74)90069-2

Mathematics Subject Classification ID

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