Proper resolutions and Gorensteinness in extriangulated categories

Jiangsheng Hu, Dongdong Zhang, Panyue Zhou

Let $(\mathcal{C},\mathbb{E},\mathfrak{s})$ be an extriangulated category with a proper class $\xi$ of $\mathbb{E}$-triangles, and $\mathcal{W}$ an additive full subcategory of $\mat…