Relative homological dimensions and controllable extensions

• Ano de defesa: 2023
• Autor(a) principal: Primolan, Roger Ramirez
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Álgebra homológica relativa; Álgebras de dimensão finita; Conjectura da Dimensão Finitística; Controllable extensions; Dimensões homológicas; Extensões controláveis; Finite dimensional algebras; Finitistic Dimension Conjecture; Homological dimensions; Relative homological algebra
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/45/45131/tde-25092023-100457/

In 1956, Hochschild developed an homological theory for extensions of associative algebras. His theory went dormant for the next decades, but recent results related it to the Finitistic Dimension Conjecture: a 60 years old central conjecture for homological theory of finite dimensional algebras. In this work we will present a panoramic view on the relations between Relative Homological Algebra and the Finitistic Dimension Conjecture. We define and analyse a new class of extensions, the controllable extensions. We proved that this class preserves much of the properties of classical homological dimensions to the relative realm, in particular we are able to compute the relative global dimension of some extensions. We also translated some results of homological algebra to relative homological algebra, in particular we obtained a generalization of the homological behaviour of path algebras.