English

Automorphism group functors of algebraic superschemes

Algebraic Geometry 2023-12-05 v2 Rings and Algebras Representation Theory

Abstract

The famous theorem of Matsumura-Oort states that if XX is a proper scheme, then the automorphism group functor Aut(X)\mathfrak{Aut}(X) of XX is a locally algebraic group scheme. In this paper we generalize this theorem to the category of superschemes, that is if X\mathbb{X} is a proper superscheme, then the automorphism group functor Aut(X)\mathfrak{Aut}(\mathbb{X}) of X\mathbb{X} is a locally algebraic group superscheme. Moreover, we also show that if H1(X,TX)=0H^1(X, \mathcal{T}_X)=0, where XX is the geometric counterpart of X\mathbb{X} and TX\mathcal{T}_X is the tangent sheaf of XX, then Aut(X)\mathfrak{Aut}(\mathbb{X}) is a smooth group superscheme.

Keywords

Cite

@article{arxiv.2309.14493,
  title  = {Automorphism group functors of algebraic superschemes},
  author = {Alexandr N. Zubkov},
  journal= {arXiv preprint arXiv:2309.14493},
  year   = {2023}
}

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47 pages