Applications of Potential Theory to the Analysis of Property (P_(q))
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In the dissertation, we apply classical potential theory to study Property (P_(q)) and its relation with the compactness of the ? ?-Neumann operator N_(q). The main results in the dissertation consist of four parts. In the first part, we discuss the invariance property of Property (P_(q)) under holomorphic maps on any compact subset K in ?^(n). In the second part, we show that if a compact subset K ? ?^(n) has Property (P_(q)) (q ? 1), then for any q-dimensional affine subspace E in ?^(n), K ? E has empty interior with respect to the fine topology in ?^(q). We also discuss a special case of the converse statement on a smooth pseudoconvex domain when q = 1. In the third part, we give two concrete examples of smooth complete Hartogs domains in ?^(3) regarding the smallness of the set of weakly pseudoconvex points on the boundary. Both examples conclude that if the Hausdorff 4-dimensional measure of the set of weakly pseudoconvex points is zero then the boundary has Property (P_(2)). In the fourth part, we introduce a variant of Property (P_(n-1)) on smooth pseudoconvex domains in ?^(n) (n > 2) which implies the compactness of the ? ?-Neumann operator N_(n-1).