Journal of Algebraic Geometry

The mixed Hodge structure on the fundamental group of hyperelliptic curves and higher cycles

Author(s): Elisabetta Colombo
Journal: J. Algebraic Geom. 11 (2002), 761-790.
Posted: June 10, 2002
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Abstract: In this paper we give a geometrical interpretation of an extension of mixed Hodge structures (MHS) obtained from the canonical MHS on the group ring of the fundamental group of a hyperelliptic curve modulo the fourth power of its augmentation ideal. We show that the class of this extension coincides with the regulator image of a canonical higher cycle in a hyperelliptic Jacobian. This higher cycle was introduced and studied by Collino.

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Elisabetta Colombo
Affiliation: Dipartimento di Matematica, Universita' di Milano, via Saldini 50, 20133 Milano, Italy
Email: elisabetta.colombo@mat.unimi.it

PII: S 1056-3911(02)00332-6
Received by editor(s): August 1, 2000
Posted: June 10, 2002
Additional Notes: The author acknowledges support from MURST and GNSAGA (CNR) Italy

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