BOSE-FERMI EQUIVALENCE AND INTERACTING STRING FIELD-THEORY

We show that the bosonic and the fermionic realization of the ghost ve rtex in the Half-String (HS) Operator approach to Witten's String Fiel d Theory (WSFT) are equivalent. In the process we discover that higher vertices (i.e., N > 3) can be eliminated in WSFT using only the overl ap conditions defining the interaction vertex and ghost number countin g.