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Über eine Klasse hypoelliptischer Operatoren. (Russian) Zbl 0211.40503


MSC:

35H10 Hypoelliptic equations
35R20 Operator partial differential equations (= PDEs on finite-dimensional spaces for abstract space valued functions)
47A50 Equations and inequalities involving linear operators, with vector unknowns

Citations:

Zbl 0252.35057