A report on "Regulators of canonical extension are torsion; the smooth divisor case"

Details A report on "Regulators of canonical extension are torsion; the smooth divisor case" A report on "Regulators of canonical extension are torsion; the smooth divisor case"

2008-03-10

arxiv.org/abs/0803.1348v1

Mathematics

Algebraic Geometry

Scientific paper

In this note, we report on a work jointly done with C. Simpson on a generalization of Reznikov's theorem which says that the Chern-Simons classes and in particular the Deligne Chern classes (in degrees $> 1$) are torsion, of a flat vector bundle on a smooth complex projective variety. We consider the case of a smooth quasi--projective variety with an irreducible smooth divisor at infinity. We define the Chern-Simons classes of the Deligne's \textit{canonical extension} of a flat vector bundle with unipotent monodromy at infinity, which lift the Deligne Chern classes and prove that these classes are torsion. The details of the proof can be found in arxiv:0707.0372 [math.AG].

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