PAULI-VILLARS REGULATOR AS A NONPERTURBATIVE ULTRAVIOLET REGULARIZATION SCHEME IN DISCRETIZED LIGHT-CONE QUANTIZATION - ART. NO. 025005

We propose a solution to the problem of renormalizing light-cone Hamil tonian theories while maintaining Lorentz invariance and other symmetr ies. The method uses generalized Pauli-Villars regulators to render th e theory finite. We discuss the method in the context of Yukawa theory at one loop acid for a soluble model in 3 + 1 dimensions. The model i s studied nonperturbatively. Numerical results obtained with use of di scretized light-cone quantization, special integration weighting facto rs, and the complex symmetric Lanczos diagonalization algorithm compar e well with the analytic answers. [S0556-2821(98)01714-7].