Equivalence Classes in Gauge Theory on the Orbifold $S^1/Z_2$

Abstract

After a brief review of orbifold grand unified theory, we discuss two topics related to the choice of boundary conditions on the orbifold $S^1/Z_2$: dynamical rearrangement of gauge symmetry and equivalence classes of boundary conditions.

Comments: 4 pages, Talk given at the 12th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY 2004) June 17-23, 2004, Tsukuba, Japan