Fixed-mass sum rules as a test of the algebra of bilocal currents

By the use of light-cone commutators, whether or not we can derive the fixed-mass sum rules for an inclusive production process involving two currents is examined. In order to avoid kinematical complexity and to get a good insight into the issue, we use scalar currents and derive the fixed-mass sum rules for the process, current+current→hadron+anything, in the special kinematical region. (auth.)