Results 141 to 150 of about 12,736,939 (290)

On Hadamard 2-(51,25,12) and 2-(59,29,14) designs

open access: yesAIMS Mathematics
In this paper, we classified Hadamard $ 2 $-$ (51, 25, 12) $ designs having a non-abelian automorphism group of order 10, i.e., $ {\rm{Frob}}_{10} \cong Z_5:Z_2 $, where a subgroup isomorphic to $ Z_2 $ fixed setwise all the $ Z_5 $-orbits of the sets ...
Doris Dumičić Danilović, Andrea Švob
doaj   +1 more source

A symplectic fission scheme for the association scheme of rectangular matrices and its automorphisms

open access: yesAIMS Mathematics
In this paper, a symplectic fission scheme for the association scheme of $ m\times n $ rectangular matrices over the finite field $ \mathbb{F}_q $, denoted by $ {\rm{SMat}}(m\times n, q) $, is constructed, where $ q $ is a power of a prime number.
Yang Zhang , Shuxia Liu, Liwei Zeng
doaj   +1 more source

Some infinite classes of asymmetric nearly Hamiltonian snarks

open access: yesLe Matematiche, 2010
We determine the full automorphism group of each member of three infinite families of connected cubic graphs which are snarks. A graph is said to be nearly hamiltonian if it has a cycle which contains all vertices but one.
Carla Fiori, Beatrice Ruini
doaj  

On the symmetry of odd Leech lattice CFT

open access: yesJournal of High Energy Physics
We show that the Mathieu groups M 24 and M 23 in the isometry group of the odd Leech lattice do not lift to subgroups of the automorphism group of its lattice vertex operator (super)algebra.
Masaki Okada
doaj   +1 more source

Some finiteness conditions for automorphism groups [PDF]

open access: bronze, 1987
Silvana Franciosi, Francesco de Giovanni
openalex   +1 more source

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