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Über die Nullstellen der Lösungen einer gewissen Klasse analytischer Systeme. (Russian) Zbl 0384.35015

MSC:
35G05 Linear higher-order PDEs
35B45 A priori estimates in context of PDEs
35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
35L55 Higher-order hyperbolic systems
35K40 Second-order parabolic systems
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