Nesta quarta-feira (29/04) teremos o Seminário de Geometria Algébrica e Geometria Complexa.
Palestrante: Marco Boggi (UFF)
Título: Uniform canonical root stacks of genus 0 stable curves
Resumo: Canonical root stacks of stable curves are (non-representable)
ramified coverings of moduli stacks of stable curves of a given genus.
They have the remarkable property that their fundamental group is
isomorphic to the quotient of the mapping class group of the
corresponding surface by the subgroup generated by certain powers of
Dehn twists. We will show that for genus $0$, when all ramification
indices equal a fixed $m\geq 1$, these stacks satisfy a list of
desirable properties which closely relate their geometry with group
theoretic properties of mapping class groups in genus $0$ (talk based
on a joint work in progress with Louis Funar and Philippe Eyssidieux).
Data: Quarta-feira 29 de abril, 16 horas
Local: sala 401 – Bloco H – Gragoatá
Para maiores informações sobre os seminários e o histórico, consulte: