Results 51 to 60 of about 174,454,425 (228)

Catalan Bounds for Symmetric Strength‐Two Orthogonal Arrays

Journal of Combinatorial Designs, EarlyView.
ABSTRACT A Hamming shell construction is a two‐level array obtained by taking every binary vector of a given Hamming weight a prescribed number of times, for each weight in turn. Such arrays are invariant under all permutations of the factors, and they are strength‐two orthogonal arrays exactly when the multiplicities satisfy three linear constraints ...
Ruwan C. Karunanayaka
wiley   +1 more source

Hyperkähler isometries of K3 surfaces

Journal of High Energy Physics, 2020
We consider symmetries of K3 manifolds. Holomorphic symplectic automorphisms of K3 surfaces have been classified, and observed to be subgroups of the Mathieu group M 23.
Anindya Banerjee, Gregory W. Moore
doaj   +1 more source

Classifying Equidistant Permutation Codes

Journal of Combinatorial Designs, EarlyView.
ABSTRACT A permutation code of length n $n$ is a set of codewords, each of which contains every symbol of a set of size n $n$ exactly once. A permutation code in which any two distinct codewords differ in the same number of coordinates is called equidistant and that number is called the distance.
Patric R. J. Östergård, Luka T. Tolonen   +1 more
wiley   +1 more source

AUTOMORPHISM GROUPS OF FREE GROUPS [PDF]

Journal of the Australian Mathematical Society, 2008
Abstract This note contains some remarks on generating pairs for automorphism groups of free groups. There has been significant use of electronic assistance. Little of this is used to verify the results.
openaire   +3 more sources

Automorphisms of finite cyclic group for generator of 2

Data Analytics and Applied Mathematics
Generators are necessary to justify the creation of the automorphisms for finite cyclic q-group, where q is an odd prime. This study identifies generators of previously unclassified automorphism orders for 2-power cyclic groups.
Fatin Hanani Hasan, Mohd. Sham Mohamad, Yuhani Yusof, Siti Hasanah Jusoo, Mohammed Khalid Shahoodh, Ekkasit Sangwisut   +5 more
doaj   +1 more source

A Boothby–Wang Construction in Generalized Contact Geometry

Mathematische Nachrichten, EarlyView.
ABSTRACT We establish a generalized analogue of the Boothby–Wang theorem in generalized contact geometry, along with related results. We present a general method for constructing examples of generalized contact structures that are not of Poon–Wade type, and even examples that fail to be generalized contact structures.
Debjit Pal
wiley   +1 more source

The Automorphism Group of a Hypercube

J. Univers. Comput. Sci., 2000
JUCS - Journal of Universal Computer Science Volume Nr.
openaire   +3 more sources

El grupo de automorfismos de las curvas de Fermat

Revista Integración, 2016
Pavlos Tzermias en su artículo "The group of automorphisms of the Fermat curve"(ver [7]), prueba que el grupo de automorfismos de las curvas de Fermat proyectivas en característica 0 es el producto semidirecto de la suma directa de 2 copias del grupo ...
Marby Bolaños Ortiz, Maribel Díaz, Martha Romero Rojas   +2 more
doaj   +1 more source

Group manifolds and homogeneous spaces with HKT geometry: The role of automorphisms

Nuclear Physics B, 2020
We present a new simple proof of the fact that certain group manifolds as well as certain homogeneous spaces G/H of dimension 4n admit a triple of integrable complex structures that satisfy the quaternionic algebra and are covariantly constant with ...
A.V. Smilga
doaj   +1 more source

Graded Differential Polynomial Rings

Mathematische Nachrichten, EarlyView.
ABSTRACT We study differential polynomial rings R[t;δ]$R[t;\delta]$ over Γ$\Gamma$‐graded rings, where Γ$\Gamma$ is an arbitrary group. We show that R[t;δ]$R[t;\delta]$ admits a Γ$\Gamma$‐grading compatible with that of R$R$ if and only if δ$\delta$ is a γ$\gamma$‐derivation for some γ∈CΓ(ΓR)$\gamma \in C_\Gamma (\Gamma _R)$, and that this grading is ...
Yassine Ait Mohamed
wiley   +1 more source