A Hierarchy of Super \ Strings
arXiv:hep-th/9408007 · doi:10.1143/ptp/92.5.1019
Abstract
It is shown that the N-extended super \ string can be obtained as a special class of vacua of both the N-extended super \ string and the (N+1)-extended super \ string. This hierarchy of super \ string theories includes as subhierarchies both the superstring hierarchy given by Bastianelli, Ohta and Petersen and the \ string hierarchy given by the authors.
17 pages, OU-HET 199, Phyzzx (collapsed file corrected)