BOWLING GREEN STATE UNIVERSITY DEPARTMENT OF MATHEMATICS AND STATISTICS CALENDAR Week of March 17-21 Tuesday, March 18 2:30 PM STATISTICS SEMINAR - Room 459 MSC Pranab K. Sen, Distinguished Lukacs Professor, BGSU. "Statistical Functionals and Robustness Considerations" Wednesday, March 19 3:30 PM STATISTICS AND PROBABILITY SEMINAR - Room 300 MSC Edsel Pena, Dept. of Mathematics and Statistics, BGSU. "Smooth Goodness-of-Fit Tests" Thursday, March 20 2:30 PM SCIENTIFIC COMPUTATION SEMINAR - Room 459 MSC Panayot Vassilevski, BGSU and Bulgarian Academy of Sciences "Preconditioning non-symmetric and indefinite problems" Abstract: In this talk a general approach of preconditioning non--symmetric and possibly indefinite problems will be presented. It relies on a subspace correction idea; namely, by solving at every iteration a coarse problem one can essentially use any available preconditioner for the principal spd part of the original problem, now in a subspace form. Similar idea can be used for preconditioning problems discretized on grids with local refinement. Friday, March 21 No colloquium this week. This announcement and a schedule of future colloquia are available on the Worldwide Web; see http://www.bgsu.edu/departments/math/. If you would like to place a link to this calendar on your page, use html code Department of Mathematics and Statistics Calendar If you wish to be placed on the e-mail distribution list, or have comments or material for the calendar, send email to