Results 121 to 130 of about 789,472 (346)

On Bipartite Biregular Large Graphs Derived From Difference Sets

open access: yesJournal of Graph Theory, EarlyView.
ABSTRACT A bipartite graph G = ( V , E ) $G=(V,E)$ with V = V 1 ∪ V 2 $V={V}_{1}\cup {V}_{2}$ is biregular if all the vertices of each stable set, V 1 ${V}_{1}$ and V 2 ${V}_{2}$, have the same degree, r $r$ and s $s$, respectively. This paper studies difference sets derived from both Abelian and non‐Abelian groups.
Gabriela Araujo‐Pardo   +3 more
wiley   +1 more source

Permutation representations and rational irreducibility [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2005
The natural character π of a finite transitive permutation group G has the form 1G + θ where θ is a character which affords a rational representation of G. We call G a QI-group if this representation is irreducible over ℚ. Every 2-transitive group is a QI-group, but the latter class of groups is larger.
openaire   +2 more sources

Low‐Frequency Raman Spectra of Natural Pyrrhotites: Polarization Dependence for Its Lattice Modes

open access: yesJournal of Raman Spectroscopy, EarlyView.
The present study found low‐wavenumber Raman modes of pyrrhotite Fe1‐xS at ~68, ~87, ~117, and ~230 cm−1 for the first time, thanks to a lab‐built Raman spectrometer, in which the optical path of the incident laser was purged by Ar gas. The sufficiently high signal‐to‐noise and signal‐to‐base ratios enabled us to obtain the polarization dependence of ...
Shu‐hei Urashima   +5 more
wiley   +1 more source

Radical Uncertainty and New Sector Emergence: An Action Theory of Co‐Creative Stakeholders

open access: yesStrategic Change, EarlyView.
ABSTRACT For much of the past century, entrepreneurship scholars have sought to understand and assess the nature, role, and impact of uncertainty. While the sum total of this work has contributed valuable insights, radical uncertainty—characterized by dynamic conditions in which outcomes are unknowable at the time action must be taken—remains weakly ...
Parul Manocha   +1 more
wiley   +1 more source

Temperature‐Dependent Spectroscopy and Laser Performance of Yellow Tb:YLF Lasers with 36% Slope Efficiency at Room Temperature and 61% at 100 K

open access: yesLaser &Photonics Reviews, EarlyView.
Highly efficient cryogenic yellow laser performance of Tb:YLF (Tb3+:LiYF4) is reported. The room temperature slope efficiency of 36% increases to 61% at 100 K, while the wavelength changes from 587 to 581 nm. Moreover, red laser emission at 624 nm with 47% slope efficiency at 78 K is demonstrated.
Moritz Badtke   +4 more
wiley   +1 more source

On tensor squares of irreducible representations of almost simple groups. I

open access: yesМоделирование и анализ информационных систем, 2011
Almost simple SM_m-groups are considered. A group G is called a SM_m-group if the tensor square of any irreducible representation is decomposed into the sum of its irreducible representations with multiplicities not greater than m.
S. V. Polyakov
doaj  

Mixed-symmetry fields in de Sitter space: a group theoretical glance

open access: yesJournal of High Energy Physics, 2017
We derive the characters of all unitary irreducible representations of the (d+1)-dimensional de Sitter spacetime isometry algebra so 1 , d + 1 $$ \mathfrak{so}\left(1,\kern0.5em d+1\right) $$ , and propose a dictionary between those representations and ...
Thomas Basile   +2 more
doaj   +1 more source

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