Active T1 transitions in cellular networks Charlie Duclut, Joris Paijmans, Mandar M. Inamdar, Carl D. Modes and Frank Jülicher Eur. Phys. J. E, 45 3 (2022) 29 Published online: 23 March 2022 DOI: 10.1140/epje/s10189-022-00175-5