Research Article

Initial Systematic Investigations of the Landscape of Low-Layer NAHE Variation Extensions

Table 1

The basis vectors and GSO coefficients of the NAHE variation arranged into sets of matching boundary conditions. The worldsheet fermions , , , , and are expressed in a complex basis, while , , , and are expressed in a real basis.

Sec

21111 111
21111 000
21100 100
21010 010
21001 001