Definition 19.11.2 (079C)—The Stacks project

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Table of contents
Part 1: Preliminaries
Chapter 19: Injectives
Section 19.11: Injectives in Grothendieck categories
Definition 19.11.2 (cite)

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Definition 19.11.2. Let $\mathcal{A}$ be a Grothendieck abelian category. Let $M$ be an object of $\mathcal{A}$ . The size $|M|$ of $M$ is the cardinality of the set of subobjects of $M$ .

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