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Coercive estimations for a certain differential operator of higher order. (Russian) Zbl 0469.35036


MSC:

35G15 Boundary value problems for linear higher-order PDEs
35B45 A priori estimates in context of PDEs
35B65 Smoothness and regularity of solutions to PDEs
35A05 General existence and uniqueness theorems (PDE) (MSC2000)
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