AIR tilting subcategories of extended hearts

We introduce the notion of AIR tilting subcategories of extended hearts of $t$-structures on a triangulated category associated with silting subcategories. This notion generalizes $τ_{[d]}$-tilting pairs of extended finitely generated modules over finite-dimensional algebras to a more general framework, which includes both extended large modules over unitary rings and truncated subcategories of finite-dimensional derived categories of proper non-positive differential graded algebras. Within this setting, we establish a bijection between AIR tilting subcategories and silting subcategories. Furthermore, we define quasi-tilting and tilting subcategories of extended hearts, extending the corresponding notions from module categories, and investigate their fundamental properties along with the relationships among these tilting-related classes.

💡 Research Summary

The paper develops a unified framework that extends classical tilting theory to the setting of extended hearts of t‑structures associated with silting subcategories in a triangulated category. Starting from a triangulated category 𝔻 equipped with a contravariantly finite presilting subcategory 𝒫 satisfying certain homological vanishing conditions, the authors define the d‑extended heart d‑ℋ = 𝔻