Results 21 to 30 of about 636 (237)

An inequality for generalized quadrangles [PDF]

open access: yesProceedings of the American Mathematical Society, 1978
Let S \mathcal {S} be a generalized quadrangle of order (
openaire   +2 more sources

Quantum Walks on Generalized Quadrangles

open access: yesThe Electronic Journal of Combinatorics, 2017
We study the transition matrix of a quantum walk on strongly regular graphs. It is proposed by Emms, Hancock, Severini and Wilson in 2006, that the spectrum of $S^+(U^3)$, a matrix based on the amplitudes of walks in the quantum walk, distinguishes strongly regular graphs. We probabilistically compute the spectrum of the line intersection graphs of two
Chris D. Godsil   +2 more
openaire   +4 more sources

On finite elation generalized quadrangles with symmetries [PDF]

open access: yes, 2008
We study the structure of finite groups G which act as elation groups on finite generalized quadrangles and contain a full group of symmetries about some line through the base point.
Hachenberger, Dirk
core   +1 more source

Moufang-like conditions for generalized quadrangles and classification of all finite quasi-transitive generalized quadrangles

open access: yes, 2005
We tell the history of Moufang generalized quadrangles. We review some Moufang-like conditions, and classify finite quasi-transitive generalized quadrangles.
Van Maldeghem, Hendrik, Thas, Koen
core   +1 more source

Self-Dual and LCD Codes from Kneser Graphs K(n, 2) and Generalized Quadrangles

open access: yesMathematics
In this paper, we study self-dual and LCD codes constructed from Kneser graphs K(n, 2) and collinearity graphs of generalized quadrangles using the so-called pure and bordered construction. We determine conditions under which these codes are self-dual or
Dean Crnković, Ana Grbac
doaj   +1 more source

Projective ovoids and generalized quadrangles

open access: yes, 2007
Copyright © Walter de Gruyter 2007 All Rights Reserved.Abstract We consider a simple condition defining a tetradic set of ovoids in a projective three-space over a finite field.
Brown, M.
core   +1 more source

Affine representations of generalized quadrangles

open access: yes, 1970
It is shown that a general construction due to Tits of finite generalized quadrangles (4-gons) yields the “classical” examples and only these except when the characteristic of the underlying field is 2.
Payne, Stanley E
core   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

open access: yesAdvanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades   +7 more
wiley   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

open access: yesAdvanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro   +13 more
wiley   +1 more source

Simple groups, product actions, and generalized quadrangles [PDF]

open access: yes, 2017
The classification of flag-transitive generalized quadrangles is a long-standing open problem at the interface of finite geometry and permutation group theory.
POPIEL, T   +5 more
core   +1 more source

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