Haiyan Zhu

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20242026

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math.CT2025

Ideal approximation theory in Frobenius categories

Dandan Sun, Zhongsheng Tan, Qikai Wang +1

Let $A$ be a Frobenius category and $ω$ the full subcategory consisting of projective objects. The relations between special precovering (resp., precovering) ideals in $\…

math.CT2024

Cotorsion pairs and Enochs Conjecture for object ideals

Dandan Sun, Qikai Wang, Haiyan Zhu

Let $I$ and $J$ be object ideals in an exact category $(A; E)$ . It is proved that $(I, J)$ is a perfect ideal cotorsion p…

math.CT2024

Construction of ideal cotorsion pairs via recollements of triangulated categories

Qikai Wang, Haiyan Zhu

Let $(T^{'}, T, T^{''})$ be a recollement of triangulated categories.A complete ideal cotorsion pair in $T$ induces complete ideal cotorsion pairs i…