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We find all possible isomorphisms and 3-birational maps (i.e., birational maps which induce an isomorphism between open subsets whose respective complements have codimension at least 3) between moduli spaces of parabolic vector bundles with…

Algebraic Geometry · Mathematics 2022-06-03 David Alfaya

The monography examines the problem of constructing a group of automorphisms of a graph. A graph automorphism is a mapping of a set of vertices onto itself that preserves adjacency. The set of such automorphisms forms a vertex group of a…

History and Overview · Mathematics 2024-07-18 Sergey Kurapov , Maxim Davidovsky

We prove that every simplicial automorphism of the free splitting graph of a free group of at least rank 3 is induced by an outer automorphism of the free group.

Group Theory · Mathematics 2009-09-22 Javier Aramayona , Juan Souto

These lecture notes provide an introduction to automorphism groups of graphs. Some special families of graphs are then discussed, especially the families of Cayley graphs generated by transposition sets.

Discrete Mathematics · Computer Science 2012-06-28 Ashwin Ganesan

This paper investigates the finite generation of cluster automorphism groups. By applying the pseudo $\mathbb{N}$-grading introduced in our previous work, we establish a sufficient condition for a cluster automorphism group to be finitely…

Rings and Algebras · Mathematics 2026-05-28 Changjian Fu , Zhanhong Liang , Yinzhi Wang

In this paper, we determine the connected component of the automorphism group scheme of Matsuo algebras over fields of characteristic not $3$.

Rings and Algebras · Mathematics 2025-11-14 Jari Desmet

We give a recursion formula to generate all equivalence classes of biconnected graphs with coefficients given by the inverses of the orders of their groups of automorphisms. We give a linear map to produce a connected graph with say, u,…

Combinatorics · Mathematics 2013-03-14 Angela Mestre

Let us consider a polynomial algebra in three variables equipped with an integer grading. We construct a system of group-generating automorphisms that preserve a given grading.

Algebraic Geometry · Mathematics 2022-12-13 Anton Trushin

An explicit and complete construction of the $SU(3)$ $A_1$ associated quantum groupoid is presented in this work, inspired by the approach taken by Trinchero for the $SU(2)$ $A_l$ graphs. New creation and annihilation operators were defined…

Mathematical Physics · Physics 2018-12-21 Maria Días , Esteban Isasi , Luis Vásquez

In the paper the foundation of the $k$-orbit theory is developed. The theory opens a new simple way to the investigation of groups and multidimensional symmetries. The relations between combinatorial symmetry properties of a $k$-orbit and…

General Mathematics · Mathematics 2007-05-23 Aleksandr Golubchik

Juhasz has proved that the automorphism group of a group G of maximal class of order p^n, with p\ge 5 and n>p+1, has order divisible by $p^{\lceil(3n-2p+5)/2\rceil}$. We show that by translating the problem in terms of derivations, the…

Group Theory · Mathematics 2007-05-23 Andrea Caranti , Sandro Mattarei

We discuss anomalies associated with outer automorphisms in gauge theories based on classical groups, namely charge conjugations for $SU(N)$ and parities for $SO(2r)$. We emphasize the inequivalence (yet related by a flavor transformation)…

High Energy Physics - Theory · Physics 2022-03-22 Brian Henning , Xiaochuan Lu , Tom Melia , Hitoshi Murayama

We derive a formula connecting the orders of the automorphism groups of a finite group and of its covering groups.

Group Theory · Mathematics 2017-07-21 Avinoam Mann

We study the automorphisms of a graph product of finitely-generated abelian groups W. More precisely, we study a natural subgroup Aut* W of Aut W, with Aut* W = Aut W whenever vertex groups are finite and in a number of other cases. We…

Group Theory · Mathematics 2019-02-07 Mauricio Gutierrez , Adam Piggott , Kim Ruane

We obtain a kind of structure theorem for the automorphism group ${\rm Aut}{\cal A}$ of a unital C$^{*}$-algebra ${\cal A}$. According to it, ${\rm Aut}{\cal A}$ can be regarded as a subgroup of the semi-direct product of direct product…

Operator Algebras · Mathematics 2007-05-23 Katsunori Kawamura

On this work we study associative triple systems of the second kind. We show that for simple triple systems the automorphism group scheme is isomorphic to the automorphism group scheme of the $3$-graded associative algebra with involution…

Rings and Algebras · Mathematics 2024-06-14 Alberto Daza-Garcia

Let $S$ be a set of transpositions such that the girth of the transposition graph of $S$ is at least 5. It is shown that the automorphism group of the Cayley graph of the permutation group $H$ generated by $S$ is the semidirect product…

Discrete Mathematics · Computer Science 2013-06-18 Ashwin Ganesan

We characterise connected cubic graphs admitting a vertex- transitive group of automorphisms with an abelian normal subgroup that is not semiregular. We illustrate the utility of this result by using it to prove that the order of a…

Combinatorics · Mathematics 2014-01-14 Joy Morris , Pablo Spiga , Gabriel Verret

Given an integer $k\ge3$ and a group $G$ of odd order, if there exists a $2$-$(v,k,1)$-design and if $v$ is sufficiently large, then there is such a design whose automorphism group has a subgroup isomorphic to $G$. A weaker result is proved…

Combinatorics · Mathematics 2021-03-24 William M. Kantor

We study the effect of diagram automorphisms on rank-level duality. We use it to prove new symplectic rank-level dualities on genus zero smooth curves with marked points and chosen coordinates. We also show that rank-level dualities for the…

Representation Theory · Mathematics 2013-08-09 Swarnava Mukhopadhyay