  This paper has been withdrawn by the author, due a crucial error in the proof
of the main Theorem (Sec. 3). In particular, in deriving the bound on the
probability of error (Eq. 10) the contribution of those pairs (x', y') that are
not equal to (x, y) has not been considered. By adding the contribution of
these pairs, one can verify that a region of rates similar to the Slepian-Wolf
region will emerge.
  The author would like to acknowledge a critical review of the paper by Mr.
Paul Cuff of Stanford University who first pointed out the error.
