Surface groups, Higgs bundles and moduli spaces
 
 
Description: 

Any closed oriented topological surface of genus greater than or equal to two has a metric of constant negative curvature. The surface with its metric can be written as a quotient of the hyperbolic plane by a so-called Fuchsian subgroup of the isometry group G=PSL(2,R) of the hyperbolic plane. The Fuchsian group is given by a homomorphism of the fundamental group of the surface into PSL(2,R). The subspace of Fuchsian representations (also known as the Teichmüller space of the surface) forms a connected component in the space of all representations of the surface group. I will review this beautiful chapter of mathematics. I will then explain how one can find analogous subspaces for some more general Lie groups G and how this connects to an emerging area of geometry known as Higher Teichmüller theory. Gadgets called Higgs bundles, and their moduli spaces, will play an important role in the story.


Date:  2026-09-28
Start Time:   15:30
Speaker:  Peter Gothen (Univ. of Porto)
Institution:  CMUP, University of Porto
Place:  Online: https://keniercastillo.com/group/iberian-seminar
Organization:  at CMUC: Kenier Castillo
URL:  https://keniercastillo.com/group/iberian-seminar
See more:   <Main>   <Iberian Online Analysis Seminar>  
 
© Centre for Mathematics, University of Coimbra, funded by
Science and Technology Foundation
Financiado total ou parcialmente pela FCT, Fundação para a Ciência e a Tecnologia, I.P., sob o Financiamento de:
UID/00324/2025 Projeto Estratégico com a referência DOI https://doi.org/10.54499/UID/00324/2025.
https://doi.org/10.54499/UID/PRR/00324/2025     UID/PRR/00324/2025   https://doi.org/10.54499/UID/PRR2/00324/2025   UID/PRR2/00324/2025
Powered by: rdOnWeb v1.4 | technical support