Transformações de cremona cubo-cúbicase o complexo quadrático de retas

• Ano de defesa: 2013
• Autor(a) principal: Luciana Franca da Cunha
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Cremona; Espaço projetivo; Matemática; Transformações (Matemática
• Link de acesso: http://hdl.handle.net/1843/EABA-99UME6

A transformation is called Cremona if it is rational with rational inverse. Let G be the Plücker quadric in P5. A quadratic complex X is the intersection of G with a second quadric F. Given a line L X P5 and a linear subspace M P5, M = P3, M \L = ;, we can consider the projection L : X 99K M with center L.Our goal is to study the relation between Cremona cubo-cubic transformations and quadratic line complexes. The relation is as follows: given two lines L1 and L2 X we show that ' = L2 1L1 is a cubo-cubic Cremona transformation that will be classiedin terms of the relative position of the lines chosen. We will also show that the base locus of such a transformation contains a smooth genus 2 quintic.The basic reference for the dissertation is the article \On Cremona Transformations and Quadratic Complexes" by D. Avritzer, G. Gonzalez-Sprinberg and I. Pan, Rendiconti del Circolo Matematico di Palermo, 57 (2008), 353-375 .