Results 31 to 40 of about 3,017,157 (340)

On C$^*$-extreme points [PDF]

open access: yesProceedings of the American Mathematical Society, 2000
Summary: Each weak\(^*\) compact \(C^*\)-convex set in a hyperfinite factor (in particular in \(B({\mathcal H})\)) is the weak\(^*\) closure of the \(C^*\)-convex hull of its \(C^*\)-extreme points.
openaire   +2 more sources

On the structure of support point sets

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1990
Let X be a metrizable compact convex subset of a locally convex space. Using Choquet's Theorem, we determine the structure of the support point set of X when X has countably many extreme points. We also characterize the support points of certain families
E. Azoff, R. younis
doaj   +1 more source

Studying the Effect of Changes in Dew Point Temperature on Extreme Precipitation in the North West of Iran [PDF]

open access: yesNīvār, 2023
In the present research, using the daily precipitation data of 479 meteorological and rain gauge stations in the north west of Iran, the relationship between the changes in the dew point temperature and the precipitation in this region was investigated ...
Mahnaz Rostamian   +2 more
doaj   +1 more source

Secure Degrees of Freedom Regions of Multiple Access and Interference Channels: The Polytope Structure [PDF]

open access: yes, 2014
The sum secure degrees of freedom (s.d.o.f.) of two fundamental multi-user network structures, the K-user Gaussian multiple access (MAC) wiretap channel and the K-user interference channel (IC) with secrecy constraints, have been determined recently as K(
Ulukus, Sennur, Xie, Jianwei
core   +2 more sources

Lower Bounds of Quantum Search for Extreme Point

open access: yes, 1998
We show that Durr-Hoyer's quantum algorithm of searching for extreme point of integer function can not be sped up for functions chosen randomly. Any other algorithm acting in substantially shorter time $o(\sqrt{2^n})$ gives incorrect answer for the ...
Grover L. K., Yuri Ozhigov
core   +3 more sources

The Optimization of Bayesian Extreme Value: Empirical Evidence for the Agricultural Commodities in the US

open access: yesEconomies, 2021
Bayesian extreme value analysis was used to forecast the optimal point in agricultural commodity futures prices in the United States for cocoa, coffee, corn, soybeans and wheat. Data were collected daily between 2000 and 2020.
Jittima Singvejsakul   +2 more
doaj   +1 more source

Analyzing Spatial Relations of Extreme Precipitations of Western Iran [PDF]

open access: yesجغرافیا و توسعه, 2017
Extreme precipitations at each point are those irregular precipitations which are situated in the trail and away from the focus point of the precipitation frequency distribution of that point.
golamali mozafari   +2 more
doaj   +1 more source

Dynamics of doubly stochastic quadratic operators on a finite-dimensional simplex

open access: yesOpen Mathematics, 2016
The present paper focuses on the dynamics of doubly stochastic quadratic operators (d.s.q.o) on a finite-dimensional simplex. We prove that if a d.s.q.o. has no periodic points then the trajectory of any initial point inside the simplex is convergent. We
Abdulghafor Rawad   +3 more
doaj   +1 more source

Diameter-Aware Extreme Group Queries

open access: yesIEEE Access, 2018
In spatial databases, the objects have semantic attributes as well as geographic coordinates. Considering the two aspects, we propose the diameter-aware extreme group query (DiaEG query), which searches for good $k$ -item groups of objects. We mark the
Xi Guo   +3 more
doaj   +1 more source

Extremal dichotomy for uniformly hyperbolic systems [PDF]

open access: yes, 2015
We consider the extreme value theory of a hyperbolic toral automorphism $T: \mathbb{T}^2 \to \mathbb{T}^2$ showing that if a H\"older observation $\phi$ which is a function of a Euclidean-type distance to a non-periodic point $\zeta$ is strictly ...
Carvalho, Maria   +4 more
core   +2 more sources

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