Indecomposable Higher Chow Cycles on Low Dimensional Jacobians

Details Indecomposable Higher Chow Cycles on Low Dimensional Jacobians Indecomposable Higher Chow Cycles on Low Dimensional Jacobians

1999-09-12

arxiv.org/abs/math/9909062v1

Mathematics

Algebraic Geometry

10 pages

Scientific paper

Title: Indecomposable Higher Chow Cycles on Low Dimensional Jacobians Authors: Alberto Collino Comments: AMS-TeX, 10 pages Subj-class: Algebraic Geometry MSC-class: 14C30 ;19E15 There is a basic indecomposable higher cycle K in Bloch's higher Chow group CH^{g}(J(C),1) on the Jacobian J(C) of a general hyperelliptic curve C of genus g. Consider K(t) the translation of K associated with a point t in C, we prove that in general K - K(t) is indecomposable if the genus is at least 3. Our tool is Lewis' condition for indecomposability. We show next that on the jacobian J(C) of a general curve C of genus 3 there is a geometrically natural family of higher cycles, when C becomes hyperelliptic the family in the limit contains a component of indecomposable cycles of type K - K(t).

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