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\centerline{\large \bf Integral closure of ideals and }
\centerline{\large \bf Cohen-Macaulayness of special fiber rings}
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\centerline{Claudia Polini} \centerline{\it Department of
Mathematics, University of Oregon, USA} \centerline{e-mail: {\tt
polini@math.uoregon.edu}}


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The talk will be about two topics, the Cohen-Macaulayness of the
fiber ring of an ideal (joint work with Corso, Ghezzi and Ulrich)
and constructive ways to build elements in the integral closure
of an ideal (joint work with Corso, Ulrich and Vasconcelos).


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