Gauge symmetry of the chiral Schwinger model from an improved gauge unfixing formalism Gabriella V. Ambrósio, Cleber N. Costa, Paulo R. F. Alves, Everton M. C. Abreu, Jorge Ananias Neto and Ronaldo Thibes EPL, 142 1 (2023) 10002 Published online: 27 March 2023 DOI: 10.1209/0295-5075/acc4e5