Isolated Singularities of p -Harmonic Functions in the Plane
Juan J. Manfredi · SIAM Journal on Mathematical Analysis · 1991
A classification theorem for isolated singularities of p-harmonic functions is given and a precise asymptotic representation near the singularity is obtained. The approach is based on using the theory of quasiregular mappings to linearize the p-Laplacian by means of a hodographic transformation.