Studies on nonlinear partial differential equations via potential analysis

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We have investigated, from the point of view of potential theory, some relationships among geometric properties of domains, nonlinearity of equations and properties of solutions of nonlinear partial differential equations. In nonsmooth domains, we obtained several results concerning a boundary growth estimate, a Harnack type inequality, the existence of nontangential limits, a characterization of removable sets for Holder continuous solutions of semilinear elliptic equations, a removability theorem for semilinear heat equations and a sharp global estimate of the heat kernel.