A Counter-Example to the Equivariance Structure on Semi-universal Deformation

  title={A Counter-Example to the Equivariance Structure on Semi-universal Deformation},
  author={An Khuong Doan},
  journal={The Journal of Geometric Analysis},
  • A. Doan
  • Published 31 May 2019
  • Mathematics
  • The Journal of Geometric Analysis
If X is a projective variety and G is an algebraic group acting algebraically on X , we provide a counter-example to the existence of a G -equivariant extension on the formal semi-universal deformation of X . 
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