  The relations of antilinear maps, bipartite states and quantum channels is
summarized. Antilinear maps are applied to describe bipartite states and
entanglement. Teleportation is treated in this general formalism with an
emphasis on conditional schemes applying partially entangled pure states. It is
shown that in such schemes the entangled state shared by the parties, and those
measured by the sender should ``match'' each other.
