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t-Structures are Normal Torsion Theories


We characterize t-structures in stable ∞-categories as suitable quasicategorical factorization systems. More precisely we show that a t-structure 𝔱 on a stable ∞-category C is equivalent to a normal torsion theory 𝔽 on C, i.e. to a factorization system 𝔽 = (𝓔, ℳ) where both classes satisfy the 3-for-2 cancellation property, and a certain compatibility with pullbacks/pushouts.

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Correspondence to Fosco Loregiàn.

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Fiorenza, D., Loregiàn, F. t-Structures are Normal Torsion Theories. Appl Categor Struct 24, 181–208 (2016).

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  • Stable ∞-category
  • Triangulated category
  • t-structure
  • Quasicategory
  • Orthogonal factorization system
  • Torsion theory
  • Stability conditions on triangulated categories

Mathematics Subject Classifications (2010)

  • 18E30
  • 18E35
  • 18A40