<正> For D a Lipschitz domain in R~n, we mean that, for simplicity, D is a domain over the graph of a Lips-chitz function, we use D to denote the boundary of D. We study the general elliptic equationaijDiD)ju=0 (1)with Dirichlet boundary datau=g on D,(2)or the Neumann boundary dataaijNiDju = g on D, (3)where N = (N1,…,N_n) is the normal direction of ( D, aij' s are constants satisfying the usual ellipticity con-dition and symmetry condition. Denoting DT = Dx(O,T), ST= Dx(O,T), we also study the generalparabolic equation