Results 11 to 20 of about 34,720 (216)

Infinitesimal CR automorphisms and stability groups of infinite-type models in C2 [PDF]

open access: bronze, 2016
The purpose of this paper is to give explicit descriptions for stability groups of real rigid hypersurfaces of infinite type in $\mathbb C^2$. The decompositions of infinitesimal CR automorphisms are also given.
Atsushi Hayashimoto, Ninh Van Thu
openalex   +3 more sources

Del Pezzo surfaces with infinite automorphism groups [PDF]

open access: green, 2020
We classify del Pezzo surfaces with Du Val singularities that have infinite automorphism groups, and describe the connected components of their automorphisms groups.
Ivan Cheltsov, Yuri Prokhorov
openalex   +3 more sources

Infinite-dimensionality of the Automorphism Groups of Homogeneous Stein Manifolds [PDF]

open access: greenMathematische Annalen, 2008
We show that the group of holomorphic automorphisms of a Stein manifold X of dimension greater than 1 is infinite-dimensional, provided X is a homogeneous space of a holomorphic action of a complex Lie group.
Alan Huckleberry, Alexander Isaev
openalex   +5 more sources

The Automorphism Group of the Infinite-Rank Free Group is Coarsely Bounded [PDF]

open access: green, 2022
4 pages. v2: Incorporated referee's comment.
George Domat   +2 more
openalex   +4 more sources

Elementary abelianp-groups as automorphism groups of infinite groups. I

open access: yesMathematische Zeitschrift, 1979
If G is a group we will write Aut G for the group of all automorphisms of G and Inn G for the normal subgroup of all inner automorphisms of G. Many authors have studied the relationship between the structure of G and that of Aut G, in particular when the latter is finite. This paper is a further contribution to this study.
T. Fournelle
semanticscholar   +3 more sources

On the Automorphisms of Infinite Chevalley Groups

open access: yesCanadian Journal of Mathematics, 1969
In (8, § 3.2) Steinberg proved the following result.THEOREM. Let K be a finite field, G′ a simple Chevalley group (“normal type1”) over K. Then every automorphism of G’ is the composite of inner, graph, field, and diagonal automorphisms.For the meaning of these notions, see (8).
J. Humphreys
semanticscholar   +2 more sources

Splittings and automorphisms of relatively hyperbolic groups [PDF]

open access: yes, 2014
We study automorphisms of a relatively hyperbolic group G. When G is one-ended, we describe Out(G) using a preferred JSJ tree over subgroups that are virtually cyclic or parabolic. In particular, when G is toral relatively hyperbolic, Out(G) is virtually
Guirardel, Vincent, Levitt, Gilbert
core   +5 more sources

Automorphisms of relatively free nilpotent groups of infinite rank

open access: yesJournal of Algebra, 1989
The following striking result is proved: If \(F\) is a free group of infinite rank and \(V\) is a characteristic subgroup such that \(F/V\) is nilpotent, then the automorphisms of \(F/V\) are all ``tame'', in the sense of being induced by automorphisms of \(F\).
R. Bryant, O. Macedońska
semanticscholar   +3 more sources

The Construction of Fields with Infinite Cyclic Automorphism Group [PDF]

open access: bronzeCanadian Journal of Mathematics, 1965
This paper deals with a problem raised in a paper by J. de Groot (1): Do there exist fields Ω whose full automorphism group is isomorphic to the additive group of integers Z?The answer to this question is yes. In this paper we construct, given any subfield k of the complex numbers, extension fields Ω of k such that the automorphism group G(Ω/k) of Ω ...
Willem Kuyk
openalex   +2 more sources

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