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Definition 12.3.3. In a preadditive category $\mathcal{A}$ we call zero object, and we denote it $0$ any final and initial object as in Lemma 12.3.2 above.

Comments (1)

Comment #9861 by Anurag Kumar on

Small grammatical issue, and unclear phrasing. This should probably say something like:

In a preadditive category , we call an object that is both final and initial (as in Lemma 12.3.2 above) a zero object and denote it by .

There are also:

  • 10 comment(s) on Section 12.3: Preadditive and additive categories

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View Definition 12.3.3 as pdf