Displaying 141 – 160 of 283

Showing per page

On strong liftings for projective limits

N. Macheras, W. Strauss (1994)

Fundamenta Mathematicae

We discuss the permanence of strong liftings under the formation of projective limits. The results are based on an appropriate consistency condition of the liftings with the projective system called "self-consistency", which is fulfilled in many situations. In addition, we study the relationship of self-consistency and completion regularity as well as projective limits of lifting topologies.

On the existence of probability measures with given marginals

David Alan Edwards (1978)

Annales de l'institut Fourier

Let X be a compact ordered space and let μ , ν be two probabilities on X such that μ ( f ) ν ( f ) for every increasing continuous function f : X R . Then we show that there exists a probability θ on X × X such that(i) θ ( R ) = 1 , where R is the graph of the order in X ,(ii) the projections of θ onto X are μ and ν .This theorem is generalized to the completely regular ordered spaces of Nachbin and also to certain infinite products. We show how these theorems are related to certain results of Nachbin, Strassen and Hommel.

Orbit coupling

Hans-Otto Georgii (1997)

Annales de l'I.H.P. Probabilités et statistiques

Pointwise estimates for densities of stable semigroups of measures

Paweł Głowacki, Waldemar Hebisch (1993)

Studia Mathematica

Let μ t be a symmetric α-stable semigroup of probability measures on a homogeneous group N, where 0 < α < 2. Assume that μ t are absolutely continuous with respect to Haar measure and denote by h t the corresponding densities. We show that the estimate h t ( x ) t Ω ( x / | x | ) | x | - n - α , x≠0, holds true with some integrable function Ω on the unit sphere Σ if and only if the density of the Lévy measure of the semigroup belongs locally to the Zygmund class LlogL(N╲e). The problem turns out to be related to the properties of the maximal...

Positive vector measures with given marginals

Surjit Singh Khurana (2006)

Czechoslovak Mathematical Journal

Suppose E is an ordered locally convex space, X 1 and X 2 Hausdorff completely regular spaces and Q a uniformly bounded, convex and closed subset of M t + ( X 1 × X 2 , E ) . For i = 1 , 2 , let μ i M t + ( X i , E ) . Then, under some topological and order conditions on E , necessary and sufficient conditions are established for the existence of an element in Q , having marginals μ 1 and μ 2 .

Currently displaying 141 – 160 of 283