Results 1 to 10 of about 241 (47)

De finetti-type theorems on quasi-local algebras and infinite fermi tensor products [PDF]

open access: yesInfinite Dimensional Analysis Quantum Probability and Related Topics, 2022
Local actions of PN, the group of finite permutations on N, on quasi-local algebras are defined and proved to be PNabelian. It turns out that invariant states under local actions are automatically even, and extreme invariant states are strongly ...
V. Crismale, S. Rossi, Paola Zurlo
semanticscholar   +1 more source

Symmetric states for C*-fermi systems [PDF]

open access: yesReviews in Mathematical Physics, 2022
In the present note, which is the second part of a work concerning the study of the set of the symmetric states, we introduce the extension of the Klein transformation for general Fermi tensor product of two Z graded C-algebras, under the condition that ...
F. Fidaleo
semanticscholar   +1 more source

On partially Schur-constant models and their associated copulas

open access: yesDependence Modeling, 2021
Schur-constant vectors are used to model duration phenomena in various areas of economics and statistics. They form a particular class of exchangeable vectors and, as such, rely on a strong property of symmetry.
Lefèvre Claude
doaj   +1 more source

Implementing Markovian models for extendible Marshall–Olkin distributions

open access: yesDependence Modeling, 2022
We derive a novel stochastic representation of exchangeable Marshall–Olkin distributions based on their death-counting processes. We show that these processes are Markov.
Sloot Henrik
doaj   +1 more source

Restricted exchangeable partitions and embedding of associated hierarchies in continuum random trees [PDF]

open access: yes, 2009
We introduce the notion of a restricted exchangeable partition of N and study natural classes of such partitions. We obtain integral representations, study associated coalescents and fragmentations, embeddings into continuum random trees and convergence ...
Bo Chen, Matthias Winkel
semanticscholar   +1 more source

A population model for $\Lambda$-coalescents with neutral mutations [PDF]

open access: yes, 2007
Bertoin and Le Gall [1] introduced a certain probability measure valued Markov process that describes the evolution of a population, such that a sample from this population would exhibit a genealogy given by the so-called Λ-coalescent, or coalescent with
A. Lageraas
semanticscholar   +1 more source

The deFinetti representation of generalised Marshall–Olkin sequences

open access: yesDependence Modeling, 2020
We show that each infinite exchangeable sequence τ1, τ2, . . . of random variables of the generalised Marshall–Olkin kind can be uniquely linked to an additive subordinator via its deFinetti representation. This is useful for simulation, model estimation,
Sloot Henrik
doaj   +1 more source

Relations between ageing and dependence for exchangeable lifetimes with an extension for the IFRA/DFRA property

open access: yesDependence Modeling, 2020
We first review an approach that had been developed in the past years to introduce concepts of “bivariate ageing” for exchangeable lifetimes and to analyze mutual relations among stochastic dependence, univariate ageing, and bivariate ageing.
Nappo Giovanna, Spizzichino Fabio
doaj   +1 more source

INVARIANT MEASURES CONCENTRATED ON COUNTABLE STRUCTURES

open access: yesForum of Mathematics, Sigma, 2016
Let $L$ be a countable language. We say that a countable infinite $L$
NATHANAEL ACKERMAN   +2 more
doaj   +1 more source

The law of the iterated logarithm for exchangeable random variables

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 18, Issue 2, Page 391-396, 1995., 1993
In this note, necessary and sufficient conditions for laws of the iterated logarithm are developed for exchangeable random variables.
Hu-Ming Zhang, Robert L. Taylor
wiley   +1 more source

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