### Relative Chow correspondences and the Griffiths group, by Eric M. Friedlander

We show that Madhav Nori's rational Lefschetz theorem provides examples in
which specific levels of the "topological filtration" on algebraic cycles are
non-trivial. A relativization of earlier constructions of Chow
correspondences and graph mappings is used to adapt Nori's theorem to our
context.

Eric M. Friedlander <eric@math.nwu.edu>