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Directional derivative of the increasing rearrangement mapping and application to a queer differential equation in plasma physics. (English) Zbl 0476.35031


MSC:

35J65 Nonlinear boundary value problems for linear elliptic equations
26A24 Differentiation (real functions of one variable): general theory, generalized derivatives, mean value theorems
82D10 Statistical mechanics of plasmas
35J20 Variational methods for second-order elliptic equations
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