History, developments and open problems on approximation properties
In this paper, we give a comprehensive review of the classical approximation property. Then, we present some important results on modern variants, such as the weak bounded approximation property, the strong approximation property and p-approximation property. Most recent progress on E-approximation property and open problems are discussed at the end.
Kim, J., & Zheng, B. (2020). History, developments and open problems on approximation properties. Mathematics, 8 (7) https://doi.org/10.3390/math8071117