  A method for the nonperturbative calculation of scattering amplitudes and
cross sections is discussed in the context of light-cone quantization. The
Lanczos-based recursion method of Haydock is suggested for the computation of
matrix elements of the resolvent for the light-cone Hamiltonian, from which the
T-matrix can be constructed. The scattering of composite particles is handled
by a generalization of a formulation given by Wick.
