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We apply Pauli-Villars regularization and discretized light-cone quantizationto the nonperturbative solution of (3+1)-dimensional Yukawa theory in asingle-fermion truncation. Three heavy scalars, including two with negativenorm, are used to regulate the theory. The matrix eigenvalue problem is solvedfor the lowest-mass state with use of a new, indefinite-metric Lanczosalgorithm. Various observables are extracted from the wave functions, includingaverage multiplicities and average momenta of constituents, structurefunctions, and a form factor slope.Comment: 21 pages, 7 figures, RevTeX; published version: more extensive data  in the tables of v

Application of Pauli-Villars regularization and discretized light-cone quantization to a single-fermion truncation of Yukawa theory