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Coercive solvability of a boundary-value problem for a second-order elliptic equation in Banach space. I. (Russian) Zbl 0229.35026


MSC:

35J25 Boundary value problems for second-order elliptic equations
47F05 General theory of partial differential operators
35R20 Operator partial differential equations (= PDEs on finite-dimensional spaces for abstract space valued functions)