Results 31 to 40 of about 5,443 (259)

Strong laws of large numbers for arrays of row-wise exchangeable random elements

International Journal of Mathematics and Mathematical Sciences, 1985
Let {Xnk,1≤k≤n,n≤1} be a triangular array of row-wise exchangeable random elements in a separable Banach space.
Robert Lee Taylor, Ronald Frank Patterson   +1 more
doaj   +1 more source

Comparison of Relapse Risk Prediction Models During Active Surveillance in Stage I Seminoma: A Retrospective Multicenter Cohort Study

International Journal of Cancer, EarlyView.
ABSTRACT To improve the prediction of relapse for clinical stage I seminoma, we aimed to validate the Boormans model (incorporating tumor size, rete testis invasion, and lymphovascular invasion) against the conventional classification (tumor size > 4 cm/rete testis invasion).
Andreas Banner, Eveline Daetwyler, Stefanie Fischer, Stephanie Schöpfer‐Schwab, Karl Pemberger, Michael Scholz, Kathrin Olesch, David Oswald, Angelina Strauch, Tim Nestler, Lukas Koren‐Wagner, Robin Zeder, Clemens Mikulits, Sebastian Lenart, Christoph Seidel, Angelika Terbuch   +15 more
wiley   +1 more source

A change of measures technique for compound mixed renewal processes with applications in Risk Theory

Modern Stochastics: Theory and Applications
Given a compound mixed renewal process S under a probability measure P, we provide a characterization of all progressively equivalent martingale probability measures Q on the domain of P, that convert S into a compound mixed Poisson process.
Spyridon M. Tzaninis, Nikolaos D. Macheras   +1 more
doaj   +1 more source

Robust Tests of Forecast Accuracy for Factor‐Augmented Regressions With an Application to the Novel EA‐MD‐QD Dataset

Journal of Applied Econometrics, EarlyView.
ABSTRACT We present four novel tests of equal predictive accuracy and encompassing á Pitarakis (2023, 2025) for factor‐augmented regressions. Factors are estimated using cross‐section averages (CAs) of grouped series and our theoretical findings are empirically relevant: asymptotic normality, robustness to an overspecification of the number of factors,
Alessandro Morico, Ovidijus Stauskas
wiley   +1 more source

Distance from fractional Brownian motion with associated Hurst index $0\mathrm{<}\mathit{H}\mathrm{<}1\mathrm{/}2$ to the subspaces of Gaussian martingales involving power integrands with an arbitrary positive exponent

Modern Stochastics: Theory and Applications, 2020
We find the best approximation of the fractional Brownian motion with the Hurst index $H\in (0,1/2)$ by Gaussian martingales of the form ${\textstyle\int _{0}^{t}}{s^{\gamma }}d{W_{s}}$, where W is a Wiener process, $\gamma >0$.
Oksana Banna, Filipp Buryak, Yuliya Mishura   +2 more
doaj   +1 more source

Probabilistic Properties of F-indices of Trees [PDF]

Mathematics Interdisciplinary Research, 2019
‎The aim of this paper is to introduce some results for the F-index of the tree structures without any information on the exact values of vertex degrees‎. Three martingales related to the first Zagreb index and F-index are given‎.
Hadis Morovati, Ramin Kazemi, Akram Kohansal   +2 more
doaj   +1 more source

A Joint Test of Unconfoundedness and Common Trends

Journal of Applied Econometrics, EarlyView.
ABSTRACT We introduce an overidentification test of two alternative assumptions to identify the average treatment effect on the treated in a two‐period panel data setting: unconfoundedness and common trends. Under unconfoundedness, treatment assignment and post‐treatment outcomes are independent, conditional on control variables and pre‐treatment ...
Martin Huber, Eva‐Maria Oeß
wiley   +1 more source

Subcomputable Schnorr Randomness [PDF]

Logical Methods in Computer Science, 2017
The notion of Schnorr randomness refers to computable reals or computable functions. We propose a version of Schnorr randomness for subcomputable classes and characterize it in different ways: by Martin L\"of tests, martingales or measure computable ...
Claude Sureson
doaj   +1 more source

Stop Using Limiting Stimuli as a Measure of Sensitivities of Energetic Materials

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Accurately estimating the sensitivity of explosive materials is a potentially life‐saving task that requires standardised protocols across nations. One of the most widely applied procedures worldwide is the so‐called ‘1‐In‐6’ test from the United Nations (UN) Manual of Tests in Criteria, which estimates a ‘limiting stimulus’ for a material. In
Dennis Christensen, Geir Petter Novik
wiley   +1 more source

On the Construction of the Neutrosophic Itˆo Integral [PDF]

Neutrosophic Sets and Systems
This research pioneers a rigorous framework for stochastic calculus in the neutrosophic paradigm, explicitly modeling systems with truth, indeterminacy, and falsehood degrees. We introduce foundational constructs including Canonical Neutrosophic Brownian
Ahmed Hatip, Khalil Yahya, Mohsen Alhassoun   +2 more
doaj   +1 more source