  We derive the representation of the two-spinon wavefunction for the
Haldane-Shastry model in terms of the spinon coordinates. This result allows us
to rigorously analyze spinon interaction and its physical effects. We show that
spinons attract one another. The attraction gets stronger as the size of the
system is increased and, in the thermodynamic limit, determines the power law
with which the susceptibility diverges.
