EcoSpa: Efficient Transformer Training with Coupled Sparsity. - Jinqi Xiao; Cheng Luo; Lingyi Huang; Cheng Yang 013; Yang Sui 001; Huy Phan; Xiao Zang; Yibiao Ying; Zhexiang Tang; Anima Anandkumar; Bo Yuan 001 (CoRR, 2025)