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Spektralprobleme für Pseudodifferentialsysteme, die nach Douglis- Nirenberg elliptisch sind, und ihre Anwendungen. (Russian) Zbl 0278.35078


MSC:

35S05 Pseudodifferential operators as generalizations of partial differential operators
35J30 Higher-order elliptic equations
35P05 General topics in linear spectral theory for PDEs
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