Algebraic De Rham Theory for Completions of Fundamental Groups of Moduli Spaces of Elliptic Curves

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2018

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To study periods of fundamental groups of algebraic varieties, one requires an explicit algebraic de Rham theory for completions of fundamental groups. This thesis develops such a theory in two cases. In the first case, we develop an algebraic de Rham theory for unipotent fundamental groups of once punctured elliptic curves over a field of characteristic zero using the universal elliptic KZB connection of Calaque-Enriquez-Etingof and Levin-Racinet. We use it to give an explicit version of Tannaka duality for unipotent connections over an elliptic curve with a regular singular point at the identity. In the second case, we develop an algebriac de Rham theory for relative completion of the fundamental group of the moduli space of elliptic curves with one marked point. This allows the construction of iterated integrals involving modular forms of the second kind, whereas previously Brown and Manin only studied iterated integrals of holomorphic modular forms.

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Luo, Ma (2018). Algebraic De Rham Theory for Completions of Fundamental Groups of Moduli Spaces of Elliptic Curves. Dissertation, Duke University. Retrieved from https://hdl.handle.net/10161/16809.

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