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26B25 - Convexity of real functions of several variables, generalizations [MSC 2020] |
26D10 - Inequalities involving derivatives and differential and integral operators [MSC 2020] |
35-XX - Partial differential equations [MSC 2020] |
35A15 - Variational methods applied to PDEs [MSC 2020] |
35B05 - Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs [MSC 2020] |
35B50 - Maximum principles in context of PDEs [MSC 2020] |
35J20 - Variational methods for second-order elliptic equations [MSC 2020] |
35J25 - Boundary value problems for second-order elliptic equations [MSC 2020] |
35J65 - Nonlinear boundary value problems for linear elliptic equations [MSC 2020] |
35R35 - Free boundary problems for PDEs [MSC 2020] |