Results 141 to 150 of about 14,423,502 (287)

Symmetries of Riemann surfaces on which PSL(2, q) acts as a Hurwitz automorphism group

open access: yes, 1996
Let X be a compact Riemann surface and Aut(X) be its automorphism group. An automorphism of order 2 reversing the orientation is called a symmetry. The authors together with D.
Bujalance, E.   +12 more
core   +1 more source

Infinity‐operadic foundations for embedding calculus

open access: yesJournal of Topology, Volume 19, Issue 2, June 2026.
Abstract Motivated by applications to spaces of embeddings and automorphisms of manifolds, we consider a tower of ∞$\infty$‐categories of truncated right modules over a unital ∞$\infty$‐operad O$\mathcal {O}$. We study monoidality and naturality properties of this tower, identify its layers, describe the difference between the towers as O$\mathcal {O}$
Manuel Krannich, Alexander Kupers
wiley   +1 more source

The automorphism group of a near-ring

open access: yes, 1980
As for groups certain automorphisms of a near-ring N may be regarded as inner. The inner automorphisms of N form a normal subgroup of the automorphism group of N.
S. D. Scott
core   +1 more source

The pants graph of a free group

open access: yesJournal of Topology, Volume 19, Issue 2, June 2026.
Abstract We introduce the concept of a pants decomposition for a finitely generated free group and construct the corresponding pants graph. A pants decomposition of a free group leads to the formation of a simplicial graph, referred to as the pants graph of a free group, consisting of all possible pants decompositions.
Donggyun Seo
wiley   +1 more source

On the characterization of Danielewski surfaces by their automorphism group

open access: yes, 2022
In this note we show that if the automorphism group of a normal affine surface S is isomorphic to the automorphism group of a Danielewski surface, then S is isomorphic to the normalization of a Danielewski ...
Alvaro Liendo   +5 more
core   +1 more source

Thurston norm for coherent right‐angled Artin groups via L2$L^2$‐invariants

open access: yesJournal of Topology, Volume 19, Issue 2, June 2026.
Abstract We define a new notion of splitting complexity for a group G$G$ along a non‐trivial integral character ϕ∈H1(G;Z)$\phi \in H^1(G; \mathbb {Z})$. If G$G$ is a one‐ended coherent right‐angled Artin group, we show that the splitting complexity along an epimorphism ϕ:G→Z$\phi \colon G \rightarrow \mathbb {Z}$ equals the L2$L^2$‐Euler characteristic
Monika Kudlinska
wiley   +1 more source

Automorphism Group of the Derangement Graph

open access: yesElectronic Journal of Combinatorics, 2011
In this paper, we prove that the full automorphism group of the derangement graph $\Gamma_n$ ($n\geq3$) is equal to $(R(S_n)\rtimes\hbox{Inn} (S_n))\rtimes Z_2$, where $R(S_n)$ and $\hbox{Inn} (S_n)$ are the right regular representation and the inner ...
Yun-Ping Deng, Xiaodong Zhang
semanticscholar   +1 more source

The Quantum Automorphism Group and Undirected Trees

open access: yes, 2006
A classification of all undirected trees with automorphism group isomorphic to $(Z_2)^l$ is given in terms of a vertex partition called a refined star partition. Recently the notion of a quantum automorphism group has been defined by T.
Fulton, Melanie B.
core  

On the Automorphism Group of Integral Circulant Graphs

open access: yesElectronic Journal of Combinatorics, 2011
The integral circulant graph $X_n (D)$ has the vertex set $Z_n = \{0, 1,\ldots$, $n{-}1\}$ and vertices $a$ and $b$ are adjacent, if and only if $\gcd(a{-}b$, $n)\in D$, where $D = \{d_1,d_2, \ldots, d_k\}$ is a set of divisors of $n$.
Milan Basic, Aleksandar Ilić
semanticscholar   +1 more source

The group of automorphism of the Fermat curve

open access: yesRevista Integración, 2016
Pavlos Tzermias en su artí ulo The group of automorphisms of the Fermat urve (ver [7℄), prueba que el grupo de automorfismos de las urvas de Fermat proye tivas en ara terísti a 0 es el produ to semidire to de la suma dire ta de 2 opias del grupo í li o ...
Marby Bolaños Ortiz   +2 more
doaj  

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