  I derive a second-order local relation between the REDSHIFT-space mass
density field and the REAL-space velocity field. This relation can be useful
for comparisons between the cosmic density and peculiar velocity fields, for a
number of reasons. First, relating the real-space velocity directly to the
redshift-space density enables one to avoid the Omega-dependent reconstruction
of the density field in real space. Secondly, the reconstruction of the
three-dimensional velocity field in redshift space, questionable because of its
vorticity, is also unnecessary. Finally, a similar relation between the GALAXY
density field and the velocity field offers a way to break the Omega-bias
degeneracy in density--velocity comparisons, when combined with an additional
measurement of the redshift-space galaxy skewness. I derive the latter relation
under the assumption of nonlinear but local bias; accounting for stochasticity
of bias is left for further study.
