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Publication:3475762
zbMath0698.35168MaRDI QIDQ3475762
D. V. Efremov, Mikhail A. Shubin
Publication date: 1989
Full work available at URL: http://www.numdam.org/item?id=SEDP_1988-1989____A8_0
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
variational principlespectrumhyperbolic spaceunbounded operatorsinvariant operatorsdistribution functionSobolev embedding theoremperiodic operatorWeyl formula
Pseudodifferential operators as generalizations of partial differential operators (35S05) Spectral theory and eigenvalue problems for partial differential equations (35P99)
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