SAADI, ABDERACHIDLYAGHFOURI, ABDESLEM2019-11-282019-11-282019http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/18957In this work, we study the continuity of the free boundary in a class of elliptic problems, with a Neuman boundary condition. The main idea is the use of a change of variable that reduces the problem to the one studied in [16].enFree boundary; Neuman boundary condition; change of variable.Article