@article{10_1017_fmp_2021_15,
     author = {Toby Cubitt and David Perez-Garcia and Michael M. Wolf},
     title = {Undecidability of the {Spectral} {Gap}},
     journal = {Forum of Mathematics, Pi},
     publisher = {mathdoc},
     volume = {10},
     year = {2022},
     doi = {10.1017/fmp.2021.15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/fmp.2021.15/}
}