31Axx Two-dimensional theory

31A05  Harmonic, subharmonic, superharmonic functions
31A10  Integral representations, integral operators, integral
               equations methods
31A15  Potentials and capacity, harmonic measure, extremal length,
               See also {30C85}
31A20  Boundary behavior (theorems of Fatou type, etc.)
31A25  Boundary value and inverse problems
31A30  Biharmonic, polyharmonic functions and equations, Poisson's
               equation
31A35  Connections with differential equations
31A99  None of the above but in this section