Results 51 to 60 of about 1,094,169 (129)
Conditional Aalen–Johansen estimation
Scandinavian Journal of Statistics, Volume 52, Issue 2, Page 873-902, June 2025.Abstract The conditional Aalen–Johansen estimator, a general‐purpose nonparametric estimator of conditional state occupation probabilities, is introduced. The estimator is applicable for any finite‐state jump process and supports conditioning on external as well as internal covariate information.
Martin Bladt, Christian Furrer
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Conditional Density Kernel Estimation Under Random Censorship for Functional Weak Dependence Data
Journal of Mathematics, Volume 2025, Issue 1, 2025.The primary objective of this research is to investigate the asymptotic properties of the conditional density nonparametric estimator. The main areas of focus are the estimator’s consistency (with rates), including those involving censored data and quasi‐associated dependent variables, as well as its performance when the covariate is functional in ...
Hamza Daoudi +4 more
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MathematicsIn this paper, we introduce a general class of quadrilateral total pairwise φ-contractions and investigate fixed-point results for such mappings in metric and semimetric spaces endowed with multiple distinct metrics.
Ravindra K. Bisht, Manuel De La Sen
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Journal of Mathematics, Volume 2025, Issue 1, 2025.This paper explores the nonparametric estimation of the volatility component in a heteroscedastic scalar‐on‐function regression model, where the underlying discrete‐time process is ergodic and subject to a missing‐at‐random mechanism. We first propose a simplified estimator for the regression and volatility operators, constructed solely from the ...
Abdelbasset Djeniah +3 more
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Fixed point theorems for contractions in semicomplete semimetric spaces [PDF]
Carpathian Journal of Mathematics, 2018 We introduce the concept of semicompleteness on semimetric space, which is weaker than completeness. We prove fixed point theorems for contractions in semicomplete semimetric spaces. Also, we generalize JachymskiMatkowski-Swia¸ tkowski’s fixed point theorem in semimetric spaces.
openaire +1 more source
Journal of Mathematics, Volume 2024, Issue 1, 2024.The objective of the paper is to present some fixed point results verifying a relational contraction utilizing certain shifting distance functions and via a generalized class of transitive relations. Our outcomes sharpen, extend, modify, and enrich many well‐known results. To demonstrate the utility of our results, several examples are provided.
Faizan Ahmad Khan +5 more
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ℐ-sn-metrizable spaces and the images of semi-metric spaces
Open MathematicsThe theory of generalized metric spaces is an active topic in general topology. In this article, we utilize the concepts of ideal convergence and networks to discuss the metrization problem and the mutual classification problem between spaces and ...
Zhou Xiangeng +3 more
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On entropy-like functionals and codes for metrized probability spaces II [PDF]
, 1992 summary:In Part I, we have proved characterization theorems for entropy-like functionals $\delta $, $\lambda $, $E$, $\Delta $ and $\Lambda $ restricted to the class consisting of all finite spaces $P\in \frak W$, the class of all semimetric spaces ...
Katětov, Miroslav
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Corrigendum to “An Easy‐to‐Understand Method to Construct Desired Distance‐Like Measures”
Complexity, Volume 2024, Issue 1, 2024.
Wen Qing Fu +5 more
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Bases Giving Distances. A New Semimetric and its Use for Nonparemetric Functional Data Analysis
, 2011 The BAGIDIS semimetric is a highly adaptivewavelet-based semimetric. It is particularly suited for dealing with curves presenting horizontally- and verticallyvarying sharp local patterns.
Delsol, Laurent +5 more
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