Results 41 to 50 of about 709,594 (295)

Crossed module actions on continuous trace C*-algebras [PDF]

open access: yes, 2016
We lift an action of a torus Tn on the spectrum of a continuous trace algebra to an action of a certain crossed module of Lie groups that is an extension of Rn.
Pennig, Ulrich, Meyer, Ralf
core   +1 more source

On central automorphisms of crossed modules

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2018
A crossed module $(T,G,\partial)$ consist of a group homomorphism $\partial:T\rightarrow G$ together with an action $(g,t)\rightarrow{}^{\,g}t$ of $G$ on $T$ satisfying $\partial(^{\,g}t)=g\partial(t)g^{-1}$ and $\,^{\partial(s)}t=sts^{-1}$, for all $g ...
M. Dehghani, B. Davvaz
doaj   +1 more source

Braids and crossed modules [PDF]

open access: yesJournal of Group Theory, 2012
AbstractFor
openaire   +3 more sources

Cross-phase modulation imaging [PDF]

open access: yesOptics Letters, 2012
We demonstrate a cross-phase modulation measurement technique based on the sensitive detection of modulation transfer in a pump-probe setup. By modulating the amplitude of the pump beam and spectrally analyzing the probe beam, we achieve a rapid, background-free measurement of nonlinear phase modulation using power levels acceptable in biological ...
Prathyush, Samineni   +4 more
openaire   +2 more sources

MCCRNet: A Multi-Level Change Contextual Refinement Network for Remote Sensing Image Change Detection

open access: yesISPRS International Journal of Geo-Information, 2021
Change detection based on bi-temporal remote sensing images has made significant progress in recent years, aiming to identify the changed and unchanged pixels between a registered pair of images. However, most learning-based change detection methods only
Qingtian Ke, Peng Zhang
doaj   +1 more source

Gradual development of S-shaped gears [PDF]

open access: yesMATEC Web of Conferences, 2022
Search for an improved gear tooth flank shape arose from heavy industry problems rolling mills. Original involute gears suffered severe flank damages.
Hlebanja Gorazd
doaj   +1 more source

Commutativity Degree of Crossed Modules

open access: yesTURKISH JOURNAL OF MATHEMATICS, 2021
Summary: In this work, we define the notion of commutativity degree of crossed modules and find some bounds on commutativity degree for special types of crossed modules. Also, we give a function for finding commutativity degree of crossed modules in \textsf{GAP} and classify crossed modules by using this function.
ODABAŞ, ALPER   +2 more
openaire   +4 more sources

Group-groupoids and crossed module aspects of monodromy groupoids [PDF]

open access: yes, 2019
International Conference of Mathematical Sciences 2018, ICMS 2018 -- 31 July 2018 through 6 August 2018 -- -- 146701In this extended abstract considering the topological version of categorical equivalence of crossed modules and group-groupoids we develop
Demir, Serap   +5 more
core   +1 more source

Dynamical generalization of Yetter’s model based on a crossed module of discrete groups

open access: yesJournal of High Energy Physics, 2021
We construct a lattice model based on a crossed module of possibly non-abelian finite groups. It generalizes known topological quantum field theories, but in contrast to these models admits local physical excitations.
Arkadiusz Bochniak   +2 more
doaj   +1 more source

Crossed module aspects of monodromy groupoids for topological internal groupoids [PDF]

open access: yes, 2019
Şahan, Tunçar ( Aksaray, Yazar )In this extended abstract we state the topological version of categorical equivalence between internal groupoids and crossed modules in the category of groups with operations; and explain how to develop crossed module ...
Demir, Serap   +5 more
core   +1 more source

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