On divergence form SPDEs with VMO coefficients in a half space

We extend several known results on solvability in the Sobolev spaces $W^{1}_{p}$, $p\in[2,\infty)$, of SPDEs in divergence form in \bR^{d}_{+} to equations having coefficients which are discontinuous in the space variable.Comment: 23 pages, a few errors are correcte