Rigidity of quotient singularities. (English) Zbl 0232.14005


14L30 Group actions on varieties or schemes (quotients)
14B12 Local deformation theory, Artin approximation, etc.
14B10 Infinitesimal methods in algebraic geometry
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[1] Artin, M.: Algebraic approximation of structures over complete local rings. Publ. I.H.E.S., no. 36, pp. 23-58. · Zbl 0181.48802
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[4] Quillen, D.: Differentials and derivations. Proceedings of the Conference on Categorical Algebra, A.M.S. Providence 1969. · Zbl 0199.26705
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