MemoryArena: Benchmarking Agent Memory in Interdependent Multi-Session Agentic Tasks. - Zexue He; Yu Wang; Churan Zhi; Yuanzhe Hu; Tzu-Ping Chen; Lang Yin; Ze Chen; Tong Arthur Wu; Siru Ouyang; Zihan Wang; Jiaxin Pei; Julian J. McAuley; et al. (CoRR, 2026)