Criticality of the O(N) universality via global solutions to nonperturbative fixed-point equationsYang-yang Tan, Chuang Huang, Yong-rui Chen and Wei-jie FuEur. Phys. J. C, 84 9 (2024) 897DOI: https://doi.org/10.1140/epjc/s10052-024-13291-7