31Axx
30 | 
31 | 
31B 31Axx | 30 | 31 | 31B |
| 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 |