Results 51 to 60 of about 39,105 (170)

On uniform exponential trisplitting for cocycles of linear operators in Banach spaces

open access: yesAnnals of the West University of Timisoara: Mathematics and Computer Science, 2018
The aim of this paper is to study the concept of uniform exponential trisplitting for skew-product semiflow in Banach spaces. This concept is a generalisation of the well-known concept of uniform exponential trichotomy. We obtain necessary and sufficient
Biriş Larisa Elena   +3 more
doaj   +1 more source

A Generalization for Theorems of Datko and Barbashin Type

open access: yesJournal of Function Spaces, 2015
The goal of the paper is to give some characterizations for the uniform exponential stability of evolution families by unifying the discrete-time versions of the Barbashin-type theorem and the Datko-type theorem.
Pham Viet Hai
doaj   +1 more source

Uniform Exponential Stability of Discrete Evolution Families on Space of p-Periodic Sequences

open access: yesAbstract and Applied Analysis, 2014
We prove that the discrete system ζn+1=Anζn is uniformly exponentially stable if and only if the unique solution of the Cauchy problem ζn+1=Anζn+eiθn+1zn+1,  n∈Z+, ζ0=0, is bounded for any real number θ and any p-periodic sequence z(n) with z(0)=0. Here,
Yongfang Wang   +4 more
doaj   +1 more source

A spectral mapping theorem for evolution semigroups on asymptotically almost periodic functions defined on the half line

open access: yesElectronic Journal of Differential Equations, 2002
We prove that the evolution semigroup on $AAP_0(mathbb{R}_+, X)$ is strongly continuous. Then we prove some properties of the generator of this evolution semigroup and show some applications in the theory of inequalities.
Constantin Buse
doaj  

Boundedness of Variance Functions of Natural Exponential Families with Unbounded Support

open access: yesMathematics
The variance function (VF) is central to natural exponential family (NEF) theory. Prompted by an online query about whether, beyond the classical normal NEF, other real-line NEFs with bounded VFs exist, we establish three complementary sets of sufficient
Shaul K. Bar-Lev
doaj   +1 more source

Generalization of Jensen's and Jensen-Steffensen's inequalities and their converses by Lidstone's polynomial and majorization theorem

open access: yesJournal of Numerical Analysis and Approximation Theory, 2017
In this paper, using majorization theorems and Lidstone's interpolating polynomials we obtain results concerning Jensen's and Jensen-Steffensen's inequalities and their converses in both the integral and the discrete case.
Gorana Aras-Gazic   +2 more
doaj   +2 more sources

Clustering above Exponential Families with Tempered Exponential Measures

open access: yes, 2022
The link with exponential families has allowed $k$-means clustering to be generalized to a wide variety of data generating distributions in exponential families and clustering distortions among Bregman divergences. Getting the framework to work above exponential families is important to lift roadblocks like the lack of robustness of some population ...
Amid, Ehsan   +2 more
openaire   +2 more sources

Generating Functions for New Families of Combinatorial Numbers and Polynomials: Approach to Poisson–Charlier Polynomials and Probability Distribution Function

open access: yesAxioms, 2019
The aim of this paper is to construct generating functions for new families of combinatorial numbers and polynomials. By using these generating functions with their functional and differential equations, we not only investigate properties of these new ...
Irem Kucukoglu   +2 more
doaj   +1 more source

Exponential Family Embeddings

open access: yes, 2016
Word embeddings are a powerful approach for capturing semantic similarity among terms in a vocabulary. In this paper, we develop exponential family embeddings, a class of methods that extends the idea of word embeddings to other types of high-dimensional data.
Rudolph, Maja R.   +3 more
openaire   +2 more sources

Conjugate Priors for Exponential Families

open access: yesThe Annals of Statistics, 1979
Let $X$ be a random vector distributed according to an exponential family with natural parameter $\theta \in \Theta$. We characterize conjugate prior measures on $\Theta$ through the property of linear posterior expectation of the mean parameter of $X : E\{E(X|\theta)|X = x\} = ax + b$.
Diaconis, Persi, Ylvisaker, Donald
openaire   +3 more sources

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