Results 31 to 40 of about 115,234 (290)

Nonparametric instrumental variable estimation under monotonicity [PDF]

open access: yes, 2014
The ill-posedness of the inverse problem of recovering a regression function in a nonparametric instrumental variable model leads to estimators that may suffer from a very slow, logarithmic rate of convergence. In this paper, we show that restricting the
Chetverikov, Denis, Wilhelm, Daniel
core   +5 more sources

λ–Algebra with Some of Their Properties

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2020
    The objective of this paper is, firstly, we study a new concept noted by algebra and discuss the properties of this concept. Secondly, we introduce a new concept related to the algebra such as smallest algebra.
Hassan Hussien Ebrahim   +1 more
doaj   +1 more source

Monotone and boolean unitary Brownian motions [PDF]

open access: yes, 2015
The additive monotone (resp. boolean) unitary Brownian motion is a non-commutative stochastic process with monotone (resp. boolean) independent and stationary increments which are distributed according to the arcsine law (resp. Bernoulli law) .
Hamdi, Tarek
core   +1 more source

Rank monotonicity in centrality measures [PDF]

open access: yesNetwork Science, 2017
AbstractA measure of centrality isrank monotoneif after adding an arcx→y, all nodes with a score smaller than (or equal to)yhave still a score smaller than (or equal to)y. If, in particular, all nodes with a score smaller than or equal toyget a score smaller thany(i.e., all ties withyare broken in favor ofy), the measure is calledstrictly rank monotone.
P. Boldi, A. Luongo, S. Vigna
openaire   +1 more source

On a New Kind of Collection of Subsets Noted by δ–field and Some Concepts Defined on δ–field

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2019
     The objective of this paper is, first, study a new collection of sets such as field and we discuss the properties of this collection. Second, introduce a new concepts related to the field such as measure on field, outer measure on field and we ...
Hassan H. Ebrahim, Ibrahim S. Ahmed
doaj   +1 more source

Random Fixed Point Theorems and Applications to Random First-Order Vector-Valued Differential Equations

open access: yesJournal of Function Spaces, 2021
In this paper, we establish several random fixed point theorems for random operators satisfying some iterative condition w.r.t. a measure of noncompactness. We also discuss the case of monotone random operators in ordered Banach spaces.
Adil El-Ghabi   +2 more
doaj   +1 more source

Simplifying Monotonicity Conditions for Entanglement Measures [PDF]

open access: yesOpen Systems & Information Dynamics, 2005
We show that for a convex function the following, rather modest conditions, are equivalent to monotonicity under local operations and classical communication. The conditions are: (i) invariance under local unitaries, (ii) invariance under adding local ancilla in arbitrary state (iii) on mixtures of states possessing local orthogonal flags the function
openaire   +3 more sources

Atomicity related to non-additive integrability

open access: yes, 2016
In this paper we present some results concerning Gould integrability of vector functions with respect to a monotone measure on finitely purely atomic measure spaces.
Candeloro, Domenico   +3 more
core   +1 more source

Piecewise Monotonic Doubling Measures

open access: yesRocky Mountain Journal of Mathematics, 1996
The author studies weights (\(A_p\) weights, reverse Hölder weights, and doubling weights) under the restriction of piecewise monotonicity of the density. The \(A_p\) weights control mapping properties of the Hardy-Littlewood maximal operator and of the Hilbert transform. The spaces are defined by \(w\in A_p\) if and only if \[ A^p_p(w)= \sup_Q \Biggl({
openaire   +2 more sources

Relaxation methods for optimal control problems [PDF]

open access: yesBulletin of Mathematical Sciences, 2020
We consider a nonlinear optimal control problem with dynamics described by a differential inclusion involving a maximal monotone map A : ℝN → 2ℝN. We do not assume that D(A) = ℝN, incorporating in this way systems with unilateral constraints in our ...
Nikolaos S. Papageorgiou   +2 more
doaj   +1 more source

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