Results 71 to 80 of about 206,778 (282)

Power vector inequalities for operator pairs in Hilbert spaces and their applications

Open Mathematics
This study explores the power vector inequalities for a pair of operators (B,C)\left(B,C) in a Hilbert space. By utilizing a Mitrinović-Pečarić-Fink-type inequality for inner products and norms, we derive various power vector inequalities.
Altwaijry Najla, Dragomir Silvestru Sever, Feki Kais   +2 more
doaj   +1 more source

Two-Weight Norm Inequality for the One-Sided Hardy-Littlewood Maximal Operators in Variable Lebesgue Spaces

Journal of Function Spaces, 2016
The authors establish the two-weight norm inequalities for the one-sided Hardy-Littlewood maximal operators in variable Lebesgue spaces. As application, they obtain the two-weight norm inequalities of variable Riemann-Liouville operator and variable Weyl
Caiyin Niu, Zongguang Liu, Panwang Wang
doaj   +1 more source

On Further Refinements of Numerical Radius Inequalities

Axioms, 2023
This paper introduces several generalized extensions of some recent numerical radius inequalities of Hilbert space operators. More preciously, these inequalities refine the recent inequalities that were proved in literature.
Ayman Hazaymeh, Ahmad Qazza, Raed Hatamleh, Mohammad W. Alomari, Rania Saadeh   +4 more
doaj   +1 more source

Unital quantum operators on the Bloch ball and Bloch region

, 2003
For one qubit systems, we present a short, elementary argument characterizing unital quantum operators in terms of their action on Bloch vectors. We then show how our approach generalizes to multi-qubit systems, obtaining inequalities that govern when a `
A. Fujiwara, C. King, E.C.G. Sudarshan, G. Kimura, H. T. Williams, J. de Pillis, L. Jakobczyk, L.J. Landau, M.B. Ruskai, M.D. Choi, P. S. Bourdon   +10 more
core   +1 more source

An Increasing Misalignment Between Crop Distribution and Environmental Resources Under Climate Change in China

Advanced Science, EarlyView.
Climate change reshapes the spatial alignment between crop production and environmental resources. Using multi‐source data and a crop model, integrated climatic, water, and soil endowments for maize and wheat are quantified and compared with harvest distributions.
Zheng'e Su, Zhentao Zhang, Jin Zhao, Xia Liang, Chuang Zhao, Zhijuan Liu, Minghao Zhuang, Jing Sun, Bo Lu, Ke Liu, Johannes W. M. Pullens, Matthew T. Harrison, Deli Chen, Xiaoguang Yang   +13 more
wiley   +1 more source

Antieigenvalue inequalities in operator theory

International Journal of Mathematics and Mathematical Sciences, 2004
We will prove some inequalities among trigonometric quantities of two and three operators. In particular, we will establish an inequality among joint trigonometric quantities of two operators and trigonometric quantities of each operator. As a corollary,
Morteza Seddighin
doaj   +1 more source

Some New Inequalities of Dirichlet Eigenvalues for Laplace Operator with any Order [PDF]

, 2014
In this paper, we establish several inequalities of Dirichlet eigenvalues for Laplace operator $\Delta $ with any order on \emph{n}-dimensional Euclidean space.
Huang, Na, Niu, Pengcheng
core  

Geometric operator inequalities

Linear Algebra and its Applications, 1997
In a given \(C^*\)-algebra there are several interesting subsets (e.g., the set of idempotent elements, the set of selfadjoint invertible elements, the set of nilpotent elements of a given order, the similarity and unitary orbits of elements etc.) that have a differentiable structure and in which the length of curves is measured by means of a Finsler ...
Andruchow, E., Corach, G., Stojanoff, D.
openaire   +2 more sources

Climate Action Impacts on Steelmaking Emissions of Persistent Organic Pollutants Highlight a Gap Between the Paris Agreement and the Stockholm Convention

Advanced Science, EarlyView.
Emissions of unintentionally produced persistent organic pollutants (UPOPs) and global warming are two major environmental challenges. But their governance has largely evolved in parallel, leaving the toxicity implications of climate‐driven industrial transitions poorly understood.
Yuxiang Sun, Qiuting Yang, Jianghui Yun, Yujue Yang, Junhao Tang, Qian Liu, Minghui Zheng, Guorui Liu   +7 more
wiley   +1 more source

Weighted norm inequalities for polynomial expansions associated to some measures with mass points

, 1995
Fourier series in orthogonal polynomials with respect to a measure $\nu$ on $[-1,1]$ are studied when $\nu$ is a linear combination of a generalized Jacobi weight and finitely many Dirac deltas in $[-1,1]$.
A. M. Krall, A. Máté, B. Muckenhoupt, B. Muckenhoupt, B. Muckenhoupt, C. E. Kenig, C. Segovia, C. Segovia, C. Segovia, E. A. Rahmanov, E. Laeng, E. M. Stein, F. J. Ruiz, F. V. Atkinson, G. Szegõ, H. Pollard, J. García-Cuerva, J. García-Cuerva, J. J. Guadalupe, J. J. Guadalupe, J. J. Guadalupe, J. J. Guadalupe, J. L. Varona, J.E. Gilbert, J.J. Guadalupe, J.J. Guadalupe, L. Colzani, L. L. Littlejohn, M. Pérez, R. Askey, R.R. Coifman, R.R. Coifman, S. Bloom, S. Chanillo, T. Koornwinder, T. S. Chihara, V. M. Badkov   +36 more
core   +2 more sources