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- elliptic operators (6)
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- Fredholm property (5)
- boundary value problems (5)
- index (5)
- pseudodifferential operators (5)
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- Institut für Mathematik (115) (remove)
The paper is devoted to pseudodifferential boundary value problems in domains with singular points on the boundary. The tangent cone at a singular point is allowed to degenerate. In particular, the boundary may rotate and oscillate in a neighbourhood of such a point. We show a criterion for the Fredholm property of a boundary value problem and derive estimates of solutions close to singular points.