Berker, R.E. et al. 2026. On the Edge of Core (Non-)Emptiness: An Automated Reasoning Approach to Approval-Based Multi-Winner Voting. Proceedings of the AAAI Conference on Artificial Intelligence. 40, 20 (Mar. 2026), 16673–16681. DOI:https://doi.org/10.1609/aaai.v40i20.38709.