{ "id": "1008.3873", "version": "v3", "published": "2010-08-23T17:56:56.000Z", "updated": "2012-10-11T06:17:15.000Z", "title": "Isolated singularities of positive solutions of p-Laplacian type equations in R^d", "authors": [ "Martin Fraas", "Yehuda Pinchover" ], "comment": "26 pages, minor corrections, published version", "categories": [ "math.AP" ], "abstract": "We study the behavior of positive solutions of p-Laplacian type elliptic equations of the form Q'(u) := -p-Laplacian(u) + V |u|^(p-2) u = 0 in Omega near an isolated singular point zeta, where 1 < p < inf, Omega is a domain in R^d with d > 1, and zeta = 0 or zeta = inf. We obtain removable singularity theorems for positive solutions near zeta. In particular, using a new three-spheres theorems for certain solutions of the above equation near zeta we prove that if V belongs to a certain Kato class near zeta and p>d (respectively, p