%0 Journal Article %T Gap Equations from Fermionic Constraints on the Light-Front %A Kazunori Itakura %J Physics %D 1997 %I arXiv %R 10.1143/PTP.98.527 %X We investigate how the gap equations are obtained in the light-front formalism within the four-Fermi theories. Instead of the zero-mode constraint, we find that the "fermionic constraints" on nondynamical spinor components are responsible for symmetry breaking. Careful treatment of the infrared divergence is indispensable for obtaining the gap equation. %U http://arxiv.org/abs/hep-th/9706077v1