31XX 


Potential theory {For probabilistic potential theory, see 60J45} 

31Axx 

Twodimensional 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 