We generalize Sauer's lemma to multivalued functions, proving tight bo
unds on the cardinality of subsets of Pi(i=1)(m), {0, ..., N-m} which
avoid certain patterns. In addition, we give an application of this re
sult, bounding the uniform rate of convergence of empirical estimates
of the expectations of a set of random variables to their true expecta
tions. (C) 1995 Academic Press, Inc.