Projectives and Injectives

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Abstract

This chapter contains some basic tools and definitions of module theory:exact sequences, pullbacks and pushouts, projective and injectivemodules, and injective hulls, with applications to rings. Sections5 and 6 may be skipped.

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Projectives and Injectives. (2007). In Abstract Algebra (pp. 393–414). Springer New York. https://doi.org/10.1007/978-0-387-71568-1_10

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