2026/07/19 by Ramin Ebrahimi, Rasool Hafezi, Jiaqun Wei
#math.RT
Let A be an abelian category. Beligiannis and Reiten proved that there is a bijective correspondence between so-called projective model structures on A and hereditary cotorsion pairs in A with a contravariantly finite core. It is well-known that, tilting modules induce cotorsion pairs, so we may have a homotopicl interpretation of tilting modules. But a recent generalization of tilting modules, support τ-tilting modules, induce weak cotorsion pairs. In this paper, we define weak projective model structures and prove that there is a bijective correspondence between weak projective model structures and left weak cotorsion pairs satisfying some mild conditions. This is a generalization of Beligiannis-Reiten correspondence from the perspective and philosophy of τ-tilting theory. In particular, we prove that any support τ-tilting module induce a model structure, and there is bijective correspondence between support τ-tilting modules and a certain class of model structures.