M2N: Mesh Movement Networks for PDE Solvers - Song, Wenbin; Zhang, Mingrui; Wallwork, Joseph G; Gao, Junpeng; Tian, Zheng; Sun, Fanglei; Piggott, Matthew; Chen, Junqing; Shi, Zuoqiang; Chen, Xiang; Wang, Jun (Advances in Neural Information Processing Systems, 2022)