This book presents a comprehensive study of boundary value problems for linear and semilinear second order elliptic equations with measure data, especially semilinear equations with absorption. The interactions between the diffusion operator and the absorption term give rise to a large class of nonlinear phenomena in the study of which singularities and boundary trace play a central role.

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Obsessive-Compulsive Disorder and Uncertainty examines the intrapsychic features of the self as it presents within OCD compulsive doubting. Moshe Marcus and Steven Tuber suggest a phenomenological framework through which to consider the interplay between the cognitive as well as affective components required to make judgments.