A Hierarchy of Super w Strings
Hiroshi Kunitomo, Makoto Sakaguchi, A. Tokura · Progress of Theoretical Physics · 1994
It is shown that the N-extended super wn string can be obtained as a special class of vacua of both the N-extended super wn+1 string and the (N + 1)-extended super wn string. This hierarchy of super w string theories includes as subhierarchies both the superstring hierarchy given by Bastianelli, Ohta and Petersen and the w string hierarchy given by the authors.