Workshop on Recent Developments in Hodge Theory and O-minimality

Hodge-Theoretic Anabelian Geometry

Abstract: The anabelian phenomenon may be viewed as an arithmetic analogue of Mostow rigidity: it predicts that certain varieties can be reconstructed from their arithmetic fundamental groups. A celebrated result of S. Mochizuki shows that hyperbolic curves over p-adic fields exhibit this phenomenon. 
Inspired by non-abelian Hodge theory, we introduce a Hodge-theoretic analogue of arithmetic fundamental groups for complex Kähler manifolds, and show that an anabelian phenomenon occurs in complex-analytic geometry. In particular, hyperbolic Riemann surfaces are uniquely determined by their Hodge-theoretic fundamental groups, yielding a complex-analytic analogue of Mochizuki’s result. If time permits, we will discuss higher-dimensional generalizations. 

 

Date & Time

March 12, 2026 | 10:45am – 11:45am
Add to calendar 03/12/2026 10:45 03/12/2026 11:45 Workshop on Recent Developments in Hodge Theory and O-minimality use-title Topic: Hodge-Theoretic Anabelian Geometry Speakers: Qixiang Wang, University of Paris, Saclay More: https://www.ias.edu/events/workshop-recent-developments-hodge-theory-and-o-minimality-11 Abstract: The anabelian phenomenon may be viewed as an arithmetic analogue of Mostow rigidity: it predicts that certain varieties can be reconstructed from their arithmetic fundamental groups. A celebrated result of S. Mochizuki shows that hyperbolic curves over p-adic fields exhibit this phenomenon.  Inspired by non-abelian Hodge theory, we introduce a Hodge-theoretic analogue of arithmetic fundamental groups for complex Kähler manifolds, and show that an anabelian phenomenon occurs in complex-analytic geometry. In particular, hyperbolic Riemann surfaces are uniquely determined by their Hodge-theoretic fundamental groups, yielding a complex-analytic analogue of Mochizuki’s result. If time permits, we will discuss higher-dimensional generalizations.    Simonyi Hall 101 a7a99c3d46944b65a08073518d638c23

Location

Simonyi Hall 101

Speakers

Qixiang Wang, University of Paris, Saclay

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