Results 81 to 90 of about 29,073 (168)

Computations of quandle 2-cocycle knot invariants without explicit 2-cocycles

Journal of Knot Theory and Its Ramifications, 2017
We explore a knot invariant derived from colorings of corresponding [Formula: see text]-tangles with arbitrary connected quandles. When the quandle is an abelian extension of a certain type the invariant is equivalent to the quandle [Formula: see text]-cocycle invariant.
Clark, W. Edwin, Dunning, Larry A., Saito, Masahico   +2 more
openaire   +6 more sources

Formal higher-spin theories and Kontsevich–Shoikhet–Tsygan formality

Nuclear Physics B, 2017
The formal algebraic structures that govern higher-spin theories within the unfolded approach turn out to be related to an extension of the Kontsevich formality, namely, the Shoikhet–Tsygan formality.
Alexey Sharapov, Evgeny Skvortsov
doaj   +1 more source

Lyapunov functions for dichotomies in mean

Electronic Journal of Differential Equations, 2017
We consider the notion of an exponential dichotomy in mean for a cocycle, in which the exponential behavior in the classical notion of an exponential dichotomy is replaced by an average with respect to an invariant probability measure.
Luis Barreira, Claudia Valls
doaj  

Complete regularity of linear cocycles and the Baire category of the set of Lyapunov-Perron regular points

Forum of Mathematics, Sigma
Given a continuous linear cocycle $\mathcal {A}$ over a homeomorphism f of a compact metric space X, we investigate its set $\mathcal {R}$ of Lyapunov-Perron regular points, that is, the collection of trajectories of f that obey the ...
Jairo Bochi, Yakov Pesin, Omri Sarig
doaj   +1 more source

Translation Invariant Spaces and Asymptotic Properties of Variational Equations

Abstract and Applied Analysis, 2011
We present a new perspective concerning the study of the asymptotic behavior of variational equations by employing function spaces techniques. We give a complete description of the dichotomous behaviors of the most general case of skew-product flows ...
Adina Luminiţa Sasu, Bogdan Sasu
doaj   +1 more source

Markovian cocycles

, 1983
Quantum Markov Chains were defined by the first author [Non-commutative Markov chains. Proc. School Math. Phys. Camarino, 268-295 (1974)] as states \(\phi\) on the infinite \(C^*\)-tensor product A of countably many copies of a matrix algebra M, possessing an intrinsic statistical property (formulated in terms of generalized conditional expectations ...
ACCARDI, LUIGI, Frigerio, A.
openaire   +2 more sources

On Low-Dimensional Locally Compact Quantum Groups

, 2002
Continuing our research on extensions of locally compact quantum groups, we give a classification of all cocycle matched pairs of Lie algebras in small dimensions and prove that all of them can be exponentiated to cocycle matched pairs of Lie groups ...
Vaes, Stefaan, Vainerman, Leonid
core   +2 more sources

On two-dimensional tensor network group symmetries

New Journal of Physics
We introduce two-dimensional tensor-network representations of finite groups carrying a 4-cocycle index. We characterize the associated gapped (2+1)D phases that emerge when these anomalous symmetries act on tensor-network ground states.
José Garre-Rubio, András Molnár
doaj   +1 more source

Umbilic Lines in Orientational Order

Physical Review X, 2016
Three-dimensional orientational order in systems whose ground states possess nonzero gradients typically exhibits linelike structures or defects: λ lines in cholesterics or Skyrmion tubes in ferromagnets, for example. Here, we show that such lines can be
Thomas Machon, Gareth P. Alexander
doaj   +1 more source

Universal Central Extension of the Tensor Algebra of a Lie Superalgebra and a Commutative Associative Algebra

پژوهش‌های ریاضی, 2021
Introduction Representation as well as central extension are two of the most important concepts in the theory of Lie (super)algebras. Apart from the interest of mathematicians, the attention of physicist are also drawn to these two subjects because of ...
Malihe Yousofzadeh
doaj