  The numerical technique of discrete light-cone quantization (DLCQ) is applied
to a single-fermion truncation of Yukawa theory in four dimensions. The
truncated theory is regulated by three Pauli-Villars bosons, which are
introduced directly in the DLCQ Fock-state basis. A special form of the Lanczos
diagonalization algorithm is used to handle the indefinite metric.
Renormalization is done nonperturbatively.
