Abstract
We generalize the string construction which possesses four-dimensional space-time symmetry to allow for the removal of the fixed-point degeneracy of the partition function in the twisted sectors. We present two examples, one supersymmetric and the other non-supersymmetric, based on Z 6 discrete symmetry. Both have a rank-8 gauge group SU(3)×SU(2)×U(1) 5 (no hidden sector), three generations of chiral fermions, Higgs doublets and no Higgs color triplets.
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