2005/11/07 by C. A. M. Peters, Peters, C. A. M., J. H. M. Steenbrink +1
Mathematics · #14D07 #32G20 #Algebraic Geometry (math.AG) #FOS: Mathematics #math.AG #msc:14D07 #msc:32G20
paper · pdf · doi:10.48550/arxiv.math/0511160
15 pages, contribution to Proceedings of "Algebraic cycles and motives", EAGER Conference 2004 Leiden University
arxiv created 2005/11/07 · arxiv updated 2009/12/01
We recall the construction of the Hodge character and we show, using a result due to F. Bittner, that these can be constructed using classical pure Hodge theory only, sideskipping Deligne's construction of functorial mixed Hodge structures on the cohomology of algberaic varieties. We then give a proof, based on the weak factorization theorem, that the nearby fibre is well-defined in the Grothendieck group of varieties. Finally, various formulas for numerical invariants of Hodge-theoretic origin are presented which are associated to one-parameter degenerations of projective manifolds.