Geometrical aspects of the multicritical phase diagrams for the Blume–Emery–Griffiths model Nigar Alata, Rıza Erdem and Gül Gülpınar Eur. Phys. J. Plus, 138 5 (2023) 428 Published online: 20 May 2023 DOI: 10.1140/epjp/s13360-023-04076-0