AB5 abelian categories with only the zero object as injective or projective are constructed via a 2-functorial attachment of endomorphism families to Rickard's examples.
Springer-Verlag, New York, second edition
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Injectivity paucity in AB5 categories of oversize chains
AB5 abelian categories with only the zero object as injective or projective are constructed via a 2-functorial attachment of endomorphism families to Rickard's examples.