Results 31 to 40 of about 25,300 (266)

An inequality for schur functions

open access: yesLinear Algebra and its Applications, 1972
AbstractIf H is a subgroup of the symmetric group of degree n and χ is a complex character on H of degree 1, then the Schur function for H and χ is defined by dχH(Y) = ∑σϵH χ(σ) ∏i=1n yiσ(i) for any n-square matrix Y = (yij).It is shown that, if A1 is a positive definite matrix, A2 a positive semidefinite nonzero matrix, and μ1, μ2 complex numbers ...
Marcus, Marvin, Minc, Henryk
openaire   +2 more sources

Entropy Inequalities for Lattices

open access: yesEntropy, 2018
We study entropy inequalities for variables that are related by functional dependencies. Although the powerset on four variables is the smallest Boolean lattice with non-Shannon inequalities, there exist lattices with many more variables where the ...
Peter Harremoës
doaj   +1 more source

Generalized Stability Additive λ-Functional Inequalities With 3k-Variable in α-Homogeneous F-Spaces

open access: yesInternational Journal of Analysis and Applications, 2022
In this paper, we study to solve two additive λ-functional inequalities with 3k-variables in α-homogeneous F spaces. Then we will show that the solutions of the first and second inequalities are additive mappings.
Ly Van An
doaj   +1 more source

Sex Representation in US Stroke Clinical Trials: A Decade of Trends and Challenges

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Stroke remains a major cause of disability and mortality in the US, with significant sex‐based disparities, and females remain underrepresented in stroke clinical trials. We aimed to examine sex representation in US‐based stroke clinical trials, identify trial characteristics associated with higher female enrollment (≥ 50%), and ...
Chaitali Dagli   +5 more
wiley   +1 more source

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir   +2 more
wiley   +1 more source

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane   +3 more
wiley   +1 more source

Liquid Crystal Elastomer‐Based Haptic Pixel Arrays at Your Fingertips for Advanced Human–Machine Interfaces

open access: yesAdvanced Materials, EarlyView.
We mechanically program liquid crystal elastomer coatings as a stimuli‐responsive and digitally addressable platform for refreshable tactile displays; we validate the perceptual performance of our dynamic device matches conventional static tactile media.
Tom Bruining   +9 more
wiley   +1 more source

Tooth loss in the United Kingdom--trends in social inequalities: an age-period-and-cohort analysis.

open access: yesPLoS ONE, 2014
This study assessed trends in social inequalities in tooth loss in the United Kingdom between 1988 and 2009. Data from 20,126 adults who participated in the latest three national Adult Dental Health Surveys in England, Wales and Northern Ireland were ...
Eduardo Bernabé, Aubrey Sheiham
doaj   +1 more source

Refining and reversing the weighted arithmetic–geometric mean inequality involving convex functionals and application for the functional entropy

open access: yesJournal of Inequalities and Applications, 2020
In this paper, we present some refinements and reverses for some inequalities involving the weighted arithmetic mean and the weighted geometric mean of two convex functionals. Inequalities involving the Heinz functional mean are also obtained.
Mustapha Raïssouli, Mashael Almozini
doaj   +1 more source

Inequalities for Doubly Nonnegative Functions [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2021
Let $g$ be a bounded symmetric measurable nonnegative function on $[0,1]^2$, and $\left\lVert g \right\rVert = \int_{[0,1]^2} g(x,y) dx dy$. For a graph $G$ with vertices $\{v_1,v_2,\ldots,v_n\}$ and edge set $E(G)$, we define \[  t(G,g) \; = \;  \int_{[0,1]^n} \prod_{\{v_i,v_j\} \in E(G)} g(x_i,x_j) \: dx_1 dx_2 \cdots dx_n \; .\] We conjecture that
openaire   +2 more sources

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