Daniel Halpern 0002 Alexandros Psomas 0001 Paritosh Verma Daniel Xie Online Envy Minimization and Multicolor Discrepancy: Equivalences and Separations. 188 2025 EC https://doi.org/10.1145/3736252.3742517 conf/sigecom/2025 db/conf/sigecom/sigecom2025.html#00020VX25