Brown representability does not come for free

Details Brown representability does not come for free Brown representability does not come for free

2008-07-11

arxiv.org/abs/0807.1872v1

Mathematics

Category Theory

5 pages

Scientific paper

We exhibit a triangulated category T having both products and coproducts, and a triangulated subcategory S of T which is both localizing and colocalizing, for which neither a Bousfield localization nor a colocalization exists. It follows that neither the category S nor its dual satisfy Brown representability. Our example involves an abelian category whose derived category does not have small Hom-sets.

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