[V,n,p,res,niter] = QDDGOXnlpoisson (mesh,Dsides,Sinodes,SiDnodes,...
Sielements,Vin,nin,pin,...
Fnin,Fpin,Gin,Gpin,D,l2,l2ox,...
toll,maxit,verbose)

solves $$ -\lambda^2 V'' + (n(V,Fn) - p(V,Fp) -D)$$