Results 31 to 40 of about 808,928 (286)

Magnetic helicity in magnetohydrodynamic turbulence with a mean magnetic field [PDF]

open access: yes, 1995
A computational investigation of magnetic helicity of the fluctuatingmagnetic fieldHm in ideal and freely decaying three‐dimensional (3‐D) magnetohydrodynamics (MHD) in the presence of a uniform mean magnetic field is performed.
Bieber J. W.   +5 more
core   +2 more sources

Invariance Property for Extended Means

open access: yesResults in Mathematics, 2023
AbstractWe study the properties of the mean-type mappings $$\textbf{M}:I^p \rightarrow I^p$$ M : I p → I p
openaire   +3 more sources

Invariant means on an ideal [PDF]

open access: yesTransactions of the American Mathematical Society, 1985
Let G G be a compact abelian group and Q Q an invariant ideal of L ∞ ( G ) {L^\infty }(G) . Let M Q {M_Q} be the set of invariant means ν \nu on
openaire   +2 more sources

Vector-valued invariant means

open access: yesAequationes mathematicae, 2023
AbstractIn the paper, we will present some important results from the theory of vector-valued invariant means. Discussing the results contained in the author’s paper Badora (Ann Pol Math 58:147–159, 1993), we will add new facts that were previously not published.
openaire   +1 more source

Black-Box Optimization Using Geodesics in Statistical Manifolds

open access: yesEntropy, 2015
Information geometric optimization (IGO) is a general framework for stochastic optimization problems aiming at limiting the influence of arbitrary parametrization choices: the initial problem is transformed into the optimization of a smooth function on a
Jérémy Bensadon
doaj   +1 more source

Corrections to the Abelian Born-Infeld Action Arising from Noncommutative Geometry [PDF]

open access: yes, 2000
In a recent paper Seiberg and Witten have argued that the full action describing the dynamics of coincident branes in the weak coupling regime is invariant under a specific field redefinition, which replaces the group of ordinary gauge transformations ...
Cornalba, L.
core   +2 more sources

Invariant Means on Banach Spaces [PDF]

open access: yesAnnales Mathematicae Silesianae, 2017
Abstract In this paper we study some generalization of invariant means on Banach spaces. We give some sufficient condition for the existence of the invariant mean and some examples where we have not it.
openaire   +3 more sources

Some results of Heron mean and Young’s inequalities

open access: yesJournal of Inequalities and Applications, 2018
In this paper, we will show some improvements of Heron mean and the refinements of Young’s inequalities for operators and matrices with a different method based on others’ results.
Changsen Yang, Yonghui Ren
doaj   +1 more source

Domain-Invariant Feature and Generative Adversarial Network Boundary Enhancement for Multi-Source Unsupervised Hyperspectral Image Classification

open access: yesRemote Sensing, 2023
Hyperspectral image (HIS) classification, a crucial component of remote sensing technology, is currently challenged by edge ambiguity and the complexities of multi-source domain data.
Tuo Xu, Bing Han, Jie Li, Yuefan Du
doaj   +1 more source

The Poisson structure of the mean-field equations in the Phi^4 theory

open access: yes, 1998
We show that the mean-field time dependent equations in the Phi^4 theory can be put into a classical non-canonical hamiltonian framework with a Poisson structure which is a generalization of the standard Poisson bracket.
Balian   +10 more
core   +2 more sources

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