MMA2009 P.Code=GaspF ===============------------------------------ First Name =Francisco Last Name =Gaspar Title =Dr. Institution =University of Zaragoza Street Address = City = State =Spain Zip Code = Telephone = FAX = E-mail =fjgaspar@unizar.es URL = Title of talk and AMS Subject Classification= Francisco Gaspar, J.L. Gracia, F.J. Lisbona, Carmen Rodrigo. Development of efficient multigrid finite element methods on semi-structured triangular grids -- plenary lecture; Francisco Gaspar, J.L. Gracia, F.J. Lisbona, Carmen Rodrigo. Efficient multigrid method on hierarchical triangular grids for the Biot's consolidation problem.