2 problems

Let $\Lambda$ be a finite-dimensional algebra, and let $\tau\text{-}\mathsf{perp}(\mathsf{mod}\Lambda)$ denote the poset of $\tau$-perpendicular subcategories of…

Let $\Lambda$ be a finite-dimensional algebra. Let $\mathcal W\subseteq\mathsf{mod}\Lambda$ be a $\tau$-perpendicular subcategory of $\mathsf{mod}\Lambda$, and let…