Corner Structure of Four-Dimensional General Relativity in the Coframe Formalism

Thorngren and Wang. https://arxiv.org/abs/2106.12577

Kaidi, Ohmori, Zheng, https://arxiv.org/abs/2111.01141

Apruzzi, Bonetti, García Etxebarria, Hosseini, Schäfer-Nameki, https://arxiv.org/abs/2112.02092

Bah, Bonetti, Leung, Weck, https://arxiv.org/abs/2112.07796