Lie group analysis of the general Karmarkar condition Sunil D. Maharaj, Noeleen Naidoo, Gareth Amery and Keshlan S. Govinder Eur. Phys. J. C, 83 4 (2023) 333 Published online: 27 April 2023 DOI: 10.1140/epjc/s10052-023-11513-y