A³-Net: Calibration-Free Multi-View 3D Hand Reconstruction for Enhanced Musical Instrument Learning. - Geng Chen 006; Xufeng Jian; Yuchen Chen; Pengfei Ren 001; Jingyu Wang 001; Haifeng Sun 001; Qi Qi 001; Jing Wang 039; Jianxin Liao (IJCAI, 2025)