%0 Journal Article %T Sporadic simple groups and quotient singularities %A Ivan Cheltsov %A Constantin Shramov %J Mathematics %D 2012 %I arXiv %R 10.1070/IM2013v077n04ABEH002662 %X We show that the only sporadic simple group such that some of its faithful representations or some faithful representations of its stem extensions give rise to exceptional (weakly-exceptional but not exceptional, respectively) quotient singularities is the Hall-Janko group (the Suzuki group, respectively). %U http://arxiv.org/abs/1207.2227v2