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    3. A Primer on Semiconvex Functions in General Potential Theories

    A Primer on Semiconvex Functions in General Potential Theories

    Posted By: hill0
    Date: 14 Aug 2025 06:22:49
    A Primer on Semiconvex Functions in General Potential Theories

    A Primer on Semiconvex Functions in General Potential Theories
    English | 2025 | ISBN: 3031943392 | 154 Pages | PDF EPUB (True) | 10 MB

    This book examines the symbiotic interplay between fully nonlinear elliptic partial differential equations and general potential theories of second order. Starting with a self-contained presentation of the classical theory of first and second order differentiability properties of convex functions, it collects a wealth of results on how to treat second order differentiability in a pointwise manner for merely semicontinuous functions. The exposition features an analysis of upper contact jets for semiconvex functions, a proof of the equivalence of two crucial, independently developed lemmas of Jensen (on the viscosity theory of PDEs) and Slodkowski (on pluripotential theory), and a detailed description of the semiconvex approximation of upper semicontinuous functions.
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