Light-Cone Dominance in the Presence of Singularities Elsewhere in Coordinate Space

To exemplify the special role played by the light-cone (y2=O) in highly inelastic electroproduction, we study the contribution to electroproduction of singularities on other hyperboloids, y2 = a2 > 0. A light-cone singularity is shown to dominate by at least the power V 3/4 over an equivalent singularity on the hyperboloid y2 =a2 in the Bjorken limit. Moreover, the leading contribution from a singularity at y2 = a2 is shown not to scale as a power of v multiplying a function of x = Q2/2Mv , but instead to oscillate with the (asymptotically infinite) frequency &?Mv (1 x) in the Bjorken limit. (Submitted to Physical Review, Comments and Addenda) *Work supported by the U. S. Atomic Energy Commission