Polynomials over Z_n
Basics and results on solvable polynomials
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Revision with unchanged content. Polynomials are a classical subject of mathematics. The first step towards the abstract concept of polynomials was the investigation of real and complex functions.During the last century studies on polynomials over commutative rings with identity gave rise for researches on polynomials over other classes of algebraic structures, such as groups, semigroups,lattices, rings (with or with out identity), etc.. The purpose of this work is to give an overview of polynomials over commutative rings with identity and especially over the ring Z_n, the residue classes modu...
Revision with unchanged content. Polynomials are a classical subject of mathematics. The first step towards the abstract concept of polynomials was the investigation of real and complex functions.During the last century studies on polynomials over commutative rings with identity gave rise for researches on polynomials over other classes of algebraic structures, such as groups, semigroups,lattices, rings (with or with out identity), etc.. The purpose of this work is to give an overview of polynomials over commutative rings with identity and especially over the ring Z_n, the residue classes modulo n. Besides basic definitions and well-known results,the reader will be introduced to aspects of the abstract theory of polynomials to have results for the solvability of a polynomial equation of the form f = 0 over a variety V. This will be the basis to establish results when a po lynomial equation f = 0 over the ring Z_n has got a solution in Z_n or in an ex tension ring of Z_n. Further more, the reader will find results on reducible and irreducible polynomials over Z_n. The last chapters deal with the Galois theory for finite local commutative rings and we will see when the factor ring Z_n[x]/(f) is the smallest extension ring of Z_n. Eventually, the reader will get to know some results when a function f from Z_n to Z_n can be represented as a po lynomial function over Z_n.
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