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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2004.tde-10122014-102301
Document
Author
Full name
Grazielle Feliciani Barbosa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2004
Supervisor
Committee
Atique, Roberta Godoi Wik (President)
Kakuta, Neuza Kazuko
Levcovitz, Daniel
Title in Portuguese
Singularidades de curvas irredutíveis planas
Keywords in Portuguese
Não disponível
Abstract in Portuguese
O objetivo deste trabalho é estudar as curvas algebróides planas. O Teorema de Newton-Puiseux permite obter uma parametrização especial destas curvas chamada de parametrização de Puiseux. Apresentamos o processo de desingularização que consiste em transformar uma curva singular numa curva regular através de sucessivos blowing-ups (transformações quadráticas especiais de C2). Também estudamos o índice de interseção entre duas curvas e o semigrupo associado a uma curva, assim como as relações entre esses conceitos. Finalmente mostramos que o número de Milnor de uma curva é igual ao condutor do semigrupo associado a ela e ambos são invariantes da curva.
Title in English
Singularities of irreducible plane curves
Keywords in English
Not available
Abstract in English
Our main subject are the algebroid irreducible plane curves or plane branches. We show that every plane branch has a special kind of parametrization, the SO called Puiseux parametrization, and that a singular plane branch can be turned into a regular one, through blowing-ups. We also study the intersection index of two plane branches and the semigroup of values associated to a plane branch. Finally we estabilish the equality between the semigroup's conductor and the Milnor number of the branch.
 
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Publishing Date
2014-12-10
 
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