Titlebook: Basic Algebra; Groups, Rings and Fi P. M. Cohn Textbook 2003 Springer-Verlag London Ltd., part of Springer Nature 2003 Algebra.Basic algebr

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Rings and Modules,nd injective module (Section 4.7), and they can usefully be introduced here, as they will occur again in Chapter 10, although their main use will be in FA. Other important notions introduced here are those of matrix ring (Section 4.4) and tensor product (Section 4.8).

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Consumption Taxation and Democratic Processnd injective module (Section 4.7), and they can usefully be introduced here, as they will occur again in Chapter 10, although their main use will be in FA. Other important notions introduced here are those of matrix ring (Section 4.4) and tensor product (Section 4.8).

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Valuation Theory,bsolute value on the real and complex numbers. After the initial definitions (in Section 9.1) we shall prove the essential uniqueness of the absolute value on . and . (in Section 9.2) and go on to describe the .-adic numbers in Section 9.3 and integral elements in Section 9.4, before looking at simple cases of the extension problem in Section 9.5.

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