We study the patterns in the duality of a wide class of N = 1 supersym
metric gauge theories in four dimensions. We present many new generali
zations of the classic duality models of Kutasov and Schwimmer, which
have themselves been generalized numerous times in works of Intriligat
or, Leigh and the present authors. All of these models contain one or
two fields in a two-index tensor representation, along with fields in
the defining representation. The superpotential for the two-index tens
or(s) resembles A(k) or D-k singularity forms, generalized from number
s to matrices. Looking at the ensemble of these models, classifying th
em by superpotential, gauge group, and ''level'', we identify emerging
patterns. (C) 1998 Elsevier Science B.V.