Results 1 to 10 of about 808,928 (286)

Bulk detection of time-dependent topological transitions in quenched chiral models [PDF]

Physical Review Research, 2020
The topology of one-dimensional chiral systems is captured by the winding number of the Hamiltonian eigenstates. Here we show that this invariant can be read out by measuring the mean chiral displacement of a single-particle wave function that is ...
Alessio D'Errico, Francesco Di Colandrea, Raouf Barboza, Alexandre Dauphin, Maciej Lewenstein, Pietro Massignan, Lorenzo Marrucci, Filippo Cardano   +7 more
doaj   +4 more sources

A basic inequality for submanifolds in a cosymplectic space form [PDF]

International Journal of Mathematics and Mathematical Sciences, 2003
For submanifolds tangent to the structure vector field in cosymplectic space forms, we establish a basic inequality between the main intrinsic invariants of the submanifold, namely, its sectional curvature and scalar curvature on one side; and its main ...
Jeong-Sik Kim, Jaedong Choi
doaj   +5 more sources

On the Beckenbach–Gini–Lehmer Means and Means Mappings

Mathematics, 2020
Beckenbacg–Gini–Lehmer type means and mean-type mappings generated by functions of several variables, for which the arithmetic mean is invariant, are introduced.
Janusz Matkowski, Małgorzata Wróbel
doaj   +1 more source

$\mathcal{T}_{M}$-Amenability of Banach Algebras [PDF]

Sahand Communications in Mathematical Analysis
We introduce the notions of $\mathcal{T}_{M}$-amenability and $\phi$-$\mathcal{T}_{M}$-amenability. Then, we characterize $\phi$-$\mathcal{T}_{M}$-amenability  in terms of $WAP$-diagonals and $\phi$-invariant means. Some concrete cases are also discussed.
Ali Ghaffari, Samaneh Javadi
doaj   +1 more source

Permutation Invariant Feature Extraction Method Based on Affinity Matrix of Point Cloud [PDF]

Jisuanji gongcheng, 2022
The applicationofpoint cloud recognition and segmentation requires the extraction ofthe spatial rotation invariant and permutation invariant features of the point cloud.PointCNN extracts these features by supervised learning, but this requires additional
XU Jialin, YAO Shuang, ZHANG Ruihua, XU Hao, SHEN Yang
doaj   +1 more source

In--out intermittency in PDE and ODE models [PDF]

, 2001
We find concrete evidence for a recently discovered form of intermittency, referred to as in--out intermittency, in both PDE and ODE models of mean field dynamos.
Andrew Tworkowski, Ashwin P., Barreto E., Brandenburg A., Brandenburg A., Brooke J. M., Brooke J. M., Brooke J. M., Covas E., Covas E., Eurico Covas, Feudel F., John M. Brooke, Kitchatinov L. L., Kitchatinov L. L., Knobloch E., Knobloch E., Küker M., Ossendrijver M. A. J. H., Ossendrijver M. A. J. H., Peter Ashwin, Reza Tavakol, Schmalz S., Schmitt D., Sokoloff D., Spiegel E., Tavakol R., Tavakol R., Tavakol R., Tobias S. M., Tobias S. M., Tobias S. M., Tobias S. M., Tobias S. M., Tobias S. M., Torkelsson U., Tworkowski A., Weiss N. O., Zhang Y.   +38 more
core   +2 more sources

An amenability-like property of finite energy path and loop groups

Comptes Rendus. Mathématique, 2021
We show that the groups of finite energy loops and paths (that is, those of Sobolev class $H^1$) with values in a compact connected Lie group, as well as their central extensions, satisfy an amenability-like property: they admit a left-invariant mean on ...
Pestov, Vladimir
doaj   +1 more source

A Bi-Invariant Statistical Model Parametrized by Mean and Covariance on Rigid Motions

Entropy, 2020
This paper aims to describe a statistical model of wrapped densities for bi-invariant statistics on the group of rigid motions of a Euclidean space. Probability distributions on the group are constructed from distributions on tangent spaces and pushed to
Emmanuel Chevallier, Nicolas Guigui
doaj   +1 more source

Convergence of iterates of pre-mean-type mappings

ESAIM: Proceedings and Surveys, 2014
Pre-mean in an interval I, being defined as a function M:I2 → I such that M(x,x) = x for x ∈ I,is an essential generalization of the mean.
Matkowski Janusz
doaj   +1 more source

Fixed point properties for semigroups of nonexpansive mappings on convex sets in dual Banach spaces

Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2018
It has been a long-standing problem posed by the first author in a conference in Marseille in 1990 to characterize semitopological semigroups which have common fixed point property when acting on a nonempty weak* compact convex subset of a dual Banach ...
Anthony To-Ming Lau, Yong Zhang
doaj   +1 more source