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This article is cited in 5 scientific papers (total in 5 papers)
On local automorphisms of certain quadrics of codimension 2
A. V. Abrosimov N. I. Lobachevski State University of Nizhni Novgorod
Abstract:
The article considers nondegenerate quadrics in $\mathbf{C}^{n+1}$ with codimension 2 that are of the form $M=\{z\in\mathbf{C}^n$, $\omega\in\mathbf{C}^2:\operatorname{Im}\omega_j=\langle z,z\rangle_j$; $j=1,2\}$, where $\langle z,z\rangle_j=\sum^n_{\mu,\nu=1^{\omega^j}\mu\nu^z\mu^{\bar{z}}\nu}$ are Hermitian forms, and thje stability groups $\operatorname{Aut}_xM$ that preserve the point $x$. It is proved that if the matrix $\omega^1$ is stable and the matrix $(\omega^1)^{-1}\omega^2$ has more than two different eigenvalues, all automorphisms of $\operatorname{Aut}_xM$ are linear transformations.
Received: 17.06.1991
Citation:
A. V. Abrosimov, “On local automorphisms of certain quadrics of codimension 2”, Mat. Zametki, 52:1 (1992), 9–14; Math. Notes, 52:1 (1992), 636–640
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https://www.mathnet.ru/eng/mzm4648 https://www.mathnet.ru/eng/mzm/v52/i1/p9
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