  We solve for the critical coupling in the symmetric phase of two-dimensional
$\phi^4$ field theory using Discretized Light-Cone Quantization. We adopt
periodic boundary conditions, neglect the zero mode, and obtain a critical
coupling consistent with the critical coupling reported using conformal
truncation in light-front quantization. We find a 17% dfference from the
critical coupling reported with light-front quantization in a symmetric
polynomial basis.
