identities (3.24) and (3.20) in . Our multi-operator identities (Theorem
3.1) correspond to the identities involved in the construction — hinted (but
not carried out) in  — of a basis for the space of C-disorder fields in the
In particular, combining some of the content of the last three paragraphs,
we see that the construction of bases for the standard A[ -modules in 
-  by means of Z-operators is equivalent to the construction of bases for
the space of (7-disorder fields in the [Zp]-model — hinted in .
I am very grateful to Prof. James Lepowsky for his stimulating support
and sustained interest in the present work throughout its development. I am
indebted to Prof. Chongying Dong and Prof. James Lepowsky for showing
me their new approach (relative vertex operators) to the study of Z-operator
algebras. I am also very grateful to Prof. Robert L. Wilson for numerous
detailed discussions about this work.