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Rigidity of quotient singularities. (English) Zbl 0232.14005

MSC:
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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References:
[1] Artin, M.: Algebraic approximation of structures over complete local rings. Publ. I.H.E.S., no. 36, pp. 23-58. · Zbl 0181.48802
[2] Hartshorne, R.: Local cohomology. Lecture Notes No. 41, Berlin-Heidelberg-New York: Springer 1967.
[3] Lichtenbaum, S., Schlessinger, M.: On the cotangent complex of a morphism Trans. A.M.S.128 41-70 (1967). · Zbl 0156.27201
[4] Quillen, D.: Differentials and derivations. Proceedings of the Conference on Categorical Algebra, A.M.S. Providence 1969. · Zbl 0199.26705
[5] Schlessinger, M.: Functors of Artin rings. Trans. A.M.S.130, 208-222 (1968). · Zbl 0167.49503
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