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Doctoral Thesis
DOI
https://doi.org/10.11606/T.45.2023.tde-22092023-151330
Document
Author
Full name
Kaique Matias de Andrade Roberto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2023
Supervisor
Committee
Mariano, Hugo Luiz (President)
Dickmann, Maximo Alejandro
Lorscheid, Oliver
Miraglia Neto, Francisco
Petrovich, Alejandro Gustavo
Title in English
Multialgebraic structures and applications in abstract theories of quadratic forms and graded rings
Keywords in English
Arason-Pfister hauptsatz
Graded rings
Hyperfield
Multirings
Profinite 2-group
Quadratic forms
Special groups
Abstract in English
The aim of this work is to initiate the investigation of the precise mathematical relationships so that possible configuring a ``new adjoint'' situation between special groups, graded rings, 2-groups and profinite 2-groups. We focused in the first part of this program, i,e, in the relations between graded rings and special groups. In our investigations, the theory of multirings/hyperrings played a central role, and we got an interesting result: we have obtained an wide extension (to all special hyperfields, or special groups) of the validity of the Arason-Pfister Hauptsatz (\cite) - a positive answer to a question posed by J. Milnor in a classical paper of 1970 (\cite)- and applied that to obtain interesting properties of graded rings associated to special hyperfields (\cite, \cite).
Title in Portuguese
Estruturas multi-algébricas e aplicações em teorias abstratas de formas quadráticas e anéis graduados
Keywords in Portuguese
2-grupos profinitos
Anéis graduados
Arason-Pfister hauptsatz
Formas quadráticas
Grupo especial
Hipercorpos
Multi anéis
Abstract in Portuguese
O objetivo deste trabalho é iniciar a investigação de possíveis relações matemáticas que configurem um "novo quadro adjunto" entre grupos especiais, anéis graduados, 2-grupos e 2-grupos profinitos. Nós focamos na primeira parte deste programa, i.e. nas relações entre anéis graduados e grupos especiais. Em nossas investigações, a teoria dos multi anéis/hipercorpos desempenhou um papel central, e obtivemos um resultado interessante: uma ampla extensão (para todos os grupos/hipercorpos especiais) da validade do Arason-Pfister Hauptsatz (\cite) - uma resposta positiva para uma questão formulada por J. Milnor no clássico artigo de 1970 (\cite) - e aplicamos este resultado na obtenção de propriedades associadas aos anéis graduados provenientes de hipercorpos especiais (\cite, \cite).
 
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tese_kaique_final.pdf (1.67 Mbytes)
Publishing Date
2023-09-28
 
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