Du al Singularities Igor Burban In tro duction consider quotien singularities G where is nite subgroup

Since ha 57356nite ring extension x x the Krull dimension of x is 2 Note that x xy x In order to get kind of bijection et een 57356nite subgroups and quotien singularities need the follo wing de57356nition De57356nition 11 et GL 57356nit

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