Introduction to Galois Theory
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About this ebook
The following topics are presented in this book:
symmetric polynomials, symmetric functions, symmetric relations and Cauchy modules
Galois group and Galois theory of equations
binomial equations and fundamental theorem
inverse Galois problem and Ruffini-Abel theorem
resolutions of second, third, and fourth degree equations and monodromy
Simone Malacrida
Simone Malacrida (1977) Ha lavorato nel settore della ricerca (ottica e nanotecnologie) e, in seguito, in quello industriale-impiantistico, in particolare nel Power, nell'Oil&Gas e nelle infrastrutture. E' interessato a problematiche finanziarie ed energetiche. Ha pubblicato un primo ciclo di 21 libri principali (10 divulgativi e didattici e 11 romanzi) + 91 manuali didattici derivati. Un secondo ciclo, sempre di 21 libri, è in corso di elaborazione e sviluppo.
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Introduction to Galois Theory - Simone Malacrida
Introduction to Galois Theory
SIMONE MALACRIDA
The following topics are presented in this book:
symmetric polynomials, symmetric functions, symmetric relations and Cauchy modules
Galois group and Galois theory of equations
binomial equations and fundamental theorem
inverse Galois problem and Ruffini-Abel theorem
resolutions of second, third, and fourth degree equations and monodromy
Simone Malacrida (1977)
Engineer and writer, has worked on research, finance, energy policy and industrial plants.
ANALYTICAL INDEX
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INTRODUCTION
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I – BASIC CONCEPTS
Symmetric polynomials and Cauchy moduli
Symmetrical relationships
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II - GALOIS THEORY OF EQUATIONS
Galois group
Fundamental modules and reduction of the Galois group
Property of the Galois group
Extension for abelian groups and primitive groups
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III - APPLICATIONS OF THE GALOIS THEORY
Binomial equations
Solvability by radicals
Fundamental theorem
The inverse G alois problem
More results
Solving quadratic equations
Solving third degree equations
Solving quadratic equations
Ruffini-Abel theorem
Monodromy
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IV - TOPOLOGICAL VIEW OF THE GALOIS THEORY
Introduction and definitions
Results of the theory
INTRODUCTION
Galois theory is based on a different interpretation of the elementary algebraic equations and extends in a very general way results coming from disparate disciplines: from geometric ones such as the construction of regular polynomials with straightedge and compass to topological ones, going to define the very concepts of field and group up to complex analysis.
As such, its elaboration seemed a bit obscure
in the history of mathematics, a sort of basic incomprehension concealed the ingenious revelations of Galois (which, we recall, by chance, were not