A. Abdurrahman et J. Bordes, RELATIONSHIP BETWEEN THE COMMA THEORY AND WITTENS STRING FIELD-THEORY- ART. NO. 086003, Physical review. D. Particles and fields, 5808(8), 1998, pp. 6003
The comma representation of interacting string field theory is further
elucidated. The proof that Witten's vertex solves the comma overlap e
quations is established. In this representation, the associativity of
the star algebra is seen to hold. The relationship of the symmetry K i
n the standard formulation of Witten's string field theory to that in
the comma theory is discussed. [S0556-2821 (98)07618-8].