Abstract
In this work, we study the Griffiths infinitesimal invariant of the curve in the jacobian using secondary cohomology maps. In order to do this, we construct a special differential graded algebra \({\mathcal{A}}\) , quite similar to the Kodaira–Spencer algebra and we define a natural triple Massey product on it. This allows us to give a description of the infinitesimal invariant in terms of Massey products and to study the formality of \({\mathcal{A}}\) .
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This work has been partially supported by: (1) PRIN 2005: “Spazi di moduli e teoria di Lie”; (2) Indam (Gnsaga); (3) Far 2006 (PV): “Varietà algebriche, calcolo algebrico, grafi orientati e topologici”. The author was also partially supported by a scholarship of Politecnico di Milano.
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Rizzi, C. Infinitesimal invariant and Massey products. manuscripta math. 127, 235–248 (2008). https://doi.org/10.1007/s00229-008-0207-6
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DOI: https://doi.org/10.1007/s00229-008-0207-6