*-Trek III: the search for Ramond–Ramond couplings Original Research Article

We give a detailed discussion of the disk amplitudes with one closed string insertion, which we used to construct the supergravity couplings of noncommutative D-branes to the RR potentials, given in . We prove the inclusion of Elliottʹs formula, the integer-valued modification of the noncommutative Chern character, to all orders in the gauge field. We also give a detailed comparison between the form of the result in which Elliottʹs formula is manifest, and the form expressed in Matrix model variables.