There is a beautiful paper by Bin Yu on three common methods for getting minimax lower bounds on risk title "Assouad, Fano, and Le Cam" - https://link.springer.

There is a beautiful paper by Bin Yu on three common methods for getting minimax lower bounds on risk title "Assouad, Fano, and Le Cam" - https://link.springer.com/chapter/10.1007/978-1-4612-1880-7_29 https://link.springer.com/chapter/10.1007/978-1-4612-1880-7_....