Local singularities such that all deformations are tangentially flat

Herzog, Bernd

doi:10.1090/S0002-9947-1991-0986026-7

Local singularities such that all deformations are tangentially flat
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Trans. Amer. Math. Soc. 324 (1991), 555-601 Request permission

Abstract:

We give a criterion for a local ring $({B_0},{\mathfrak {n}_0})$ containing a field to have only tangentially flat deformations. Various examples of such local rings are constructed.

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