Results 91 to 100 of about 118,505 (227)

Real models for the framed little n$n$‐disks operads

Journal of Topology, Volume 18, Issue 4, December 2025.
Abstract We study the action of the orthogonal group on the little n$n$‐disks operads. As an application we provide small models (over the reals) for the framed little n$n$‐disks operads. It follows in particular that the framed little n$n$‐disks operads are formal (over the reals) for n$n$ even and coformal for all n$n$.
Anton Khoroshkin, Thomas Willwacher
wiley   +1 more source

Commuting Pairs in Quasigroups

Journal of Combinatorial Designs, Volume 33, Issue 11, Page 418-427, November 2025.
ABSTRACT A quasigroup is a pair ( Q , ∗ ), where Q is a nonempty set and ∗ is a binary operation on Q such that for every ( a , b ) ∈ Q 2, there exists a unique ( x , y ) ∈ Q 2 such that a ∗ x = b = y ∗ a. Let ( Q , ∗ ) be a quasigroup. A pair ( x , y ) ∈ Q 2 is a commuting pair of ( Q , ∗ ) if x ∗ y = y ∗ x.
Jack Allsop, Ian M. Wanless
wiley   +1 more source

Automorphisms of the projective unimodular group [PDF]

, 1952
Hua Liu, Irving Reiner
openalex   +2 more sources

Automorphisms of X0∗(p)

Journal of Number Theory, 2003
We determine the automorphism group of the modular curve $X_0^*(p)$ for all prime numbers $p$.
Yuji Hasegawa, Matthew Baker
openaire   +3 more sources

Jordan automorphisms, Jordan derivations of generalized triangular matrix algebra

International Journal of Mathematics and Mathematical Sciences, 2005
We investigate Jordan automorphisms and Jordan derivations of a class of algebras called generalized triangular matrix algebras. We prove that any Jordan automorphism on such an algebra is either an automorphism or an antiautomorphism and any Jordan ...
Aiat Hadj Ahmed Driss, Ben Yakoub l'Moufadal   +1 more
doaj   +1 more source

Automorphisms of groups

Journal of Algebra, 2007
AbstractThe main purpose of the present paper is to give an explicit description of the Wells map of a given group extension to the case of automorphisms acting trivially on the quotient group. From this we obtain some of new necessary and sufficient conditions for an automorphism of a normal subgroup of a group to extend to the group itself, with ...
openaire   +2 more sources

Symplectic graphs and their automorphisms

European Journal of Combinatorics, 2006
12 ...
Zhe-xian Wan, Zhongming Tang
openaire   +4 more sources

Involutions of the Moduli Space of Principal E₆-Bundles over a Compact Riemann Surface

Axioms
In this paper, the fixed points of involutions on the moduli space of principal E6-bundles over a compact Riemann surface X are investigated. In particular, it is proved that the combined action of a representative σ of the outer involution of E6 with ...
Álvaro Antón-Sancho
doaj   +1 more source

Permutation matrices and matrix equivalence over a finite field

International Journal of Mathematics and Mathematical Sciences, 1981
Let F=GF(q) denote the finite field of order q and Fm×n the ring of m×n matrices over F. Let 𝒫n be the set of all permutation matrices of order n over F so that 𝒫n is ismorphic to Sn.
Gary L. Mullen
doaj   +1 more source

Trivial automorphisms

Israel Journal of Mathematics, 2014
Thoroughly revised ...
Farah, Ilijas, Shelah, Saharon
openaire   +2 more sources