Title: Multigrid Algorithms for C^0 Interior Penalty Methods Susanne C. Brenner Department of Mathematics University of South Carolina Columbia, SC 29208 Email: brenner@math.sc.edu Web page: http://www.math.sc.edu/~fem/brenner.html Abstract: In this talk we discuss C^0 interior penalty methods for fourth order problems. The convergence of multigrid algorithms (V, F, W and variable V-cycle) is analyzed.