\magnification=1200 \hsize=4in \overfullrule=0pt \input amssym %\def\frac2{{#1\over #2}} \def\emph#1{{\it #1}} \def\em{\it} \nopagenumbers \noindent % % {\bf John Talbot} % % \medskip \noindent % % {\bf The Intersection Structure of $t$-Intersecting Families} % % \vskip 5mm \noindent % % % % A family of sets is {\it $t$-intersecting} if any two sets from the family contain at least $t$ common elements. Given a $t$-intersecting family of $r$-sets from an $n$-set, how many distinct sets of size $k$ can occur as pairwise intersections of its members? We prove an asymptotic upper bound on this number that can always be achieved. This result can be seen as a generalization of the Erd\H os-Ko-Rado theorem. \bye .