SL-FAC: A Communication-Efficient Split Learning Framework with Frequency-Aware Compression. - Zehang Lin; Miao Yang; Haihan Zhu; Zheng Lin 001; Jianhao Huang; Jing Yang; Guangjin Pan; Dianxin Luan; Zihan Fang; Shunzhi Zhu; Wei Ni 001; John S. Thompson (CoRR, 2026)