Hallucination Detection in LLMs with Topological Divergence on Attention Graphs. - Alexandra Bazarova; Andrei Volodichev; Aleksandr Yugay; Andrey Shulga; Alina Ermilova; Konstantin Polev; Julia Belikova; Rauf Parchiev; Dmitry Simakov; Maxim Savchenko; Andrey V. Savchenko; Serguei Barannikov; et al. (ACL (1), 2026)