# Mathematics Colloquia and Seminars

We present a classification of Dehn surgeries on $(p,q,r)$ pretzel knots resulting in a manifold $M(\alpha)$ having cyclic fundamental group and analyse those leading to a finite fundamental group. The proof uses the theory of cyclic and finite surgeries developed by Culler, Shalen, Boyer, and Zhang. In particular, Culler-Shalen seminorms play a central role.