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Master's Dissertation
DOI
https://doi.org/10.11606/D.45.2022.tde-11052022-151747
Document
Author
Full name
Daniel de Almeida Souza
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Mariano, Hugo Luiz (President)
Lorscheid, Oliver
Ribeiro, Hugo Rafael de Oliveira
Title in English
Motivic cohomology, Milnor K-theory, and Galois cohomology
Keywords in English
Galois cohomology
Milnor K-theory
Motivic cohomology
Abstract in English
This dissertation presents one of the possible foundations, based on motivic complexes, for the motivic cohomology of smooth varieties over a given base field $k$. Its basic properties are discussed, as well as its relation to Milnor K-theory and to certain Galois cohomology groups of $k$. In particular, we discuss the formulation in terms of motivic cohomology of the norm residue homomorphism, which compares the Milnor K-theory groups modulo a prime number $l$ different from the characteristic of $k$ with the Galois cohomology groups with coefficients in tensor powers of the module of $l$-th roots of unity. Finally, we list some preliminary results used for characterizing the Bloch-Kato conjecture in terms of certain statements of motivic nature.
Title in Portuguese
Cohomologia motívica, K-teoria de Milnor, e cohomologia galoisiana
Keywords in Portuguese
Cohomologia galoisiana
Cohomologia motívica
K-teoria de Milnor
Abstract in Portuguese
Esta dissertação apresenta uma das possíveis fundamentações, baseada em complexos motívicos, para a cohomologia motívica de variedades lisas sobre um dado corpo base $k$. São discutidas suas propriedades básicas e sua relação com a K-teoria de Milnor e com determinados grupos de cohomologia galoisiana de $k$. Em particular, é discutida a formulação em termos de cohomologia motívica do homomorfismo do resíduo da norma, que compara os grupos de K-teoria de Milnor módulo um número primo $l$ diferente da característica de $k$ com os grupos de cohomologia galoisiana com coeficientes em potências tensoriais do módulo de raízes $l$-ésimas da unidade. Por fim, são enunciados alguns resultados preliminares utilizados na caracterização da conjetura de Bloch-Kato em termos de certas afirmações de natureza motívica.
 
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Dissertacao.pdf (1.27 Mbytes)
Publishing Date
2022-05-23
 
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