Deforming reducible representations of surface and 2-orbifold groups

For a compact 2-orbifold with negative Euler characteristic O2, the variety of characters of π1(O2) in SLn(R) is a non-singular manifold at C-irreducible representations. In this paper we prove that when a C-irreducible representation of π1(O2) in SLn(R) is viewed in SLn+1(R), then the variety of ch...

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Detalles Bibliográficos
Autor: Porti, Joan|||0000-0003-2554-3709
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:312090
Acceso en línea:https://ddd.uab.cat/record/312090
https://dx.doi.org/urn:doi:10.1007/s10711-025-01011-8
Access Level:acceso abierto
Palabra clave:Primary 57K20
Secondary 14D20
57K31
57K35
Descripción
Sumario:For a compact 2-orbifold with negative Euler characteristic O2, the variety of characters of π1(O2) in SLn(R) is a non-singular manifold at C-irreducible representations. In this paper we prove that when a C-irreducible representation of π1(O2) in SLn(R) is viewed in SLn+1(R), then the variety of characters is singular, and we describe the singularity.