Results 41 to 50 of about 184 (111)
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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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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A regular Lindelöf semimetric space which has no countable network [PDF]
Proceedings of the American Mathematical Society, 1970 A completely regular semimetric space M M is constructed which has no
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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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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.
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Metric transforms of finite spaces and connected graphs
, 1986 A metric transform of a semimetric space X is obtained from X by measuring the distances by a different (not always proportional) scale. Two semimetric spaces are said to be isomorphic if one is isometric to a metric transform of the other.
Maehara, Hiroshi
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Barisan Cauchy pada Ruang Semimetrik Terbatas [PDF]
Semimetric spaces with bounded property means that it is bounded below and bounded above by constant multiples of a metric space. Moreover, in semimetric spaces, every convergent sequence is not necessarily to be a Cauchy sequence.
Musthofa, Syarto +2 more
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The local triangle axiom in topology and domain theory [PDF]
, 2003 We introduce a general notion of distance in weakly separated topological spaces. Our approach differs from existing ones since we do not assume the reflexivity axiom in general.
Pawel Waszkiewicz, Waszkiewicz, Pawel
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Ultrametrics and Complete Multipartite Graphs
, 2022 Let (X, d) be a semimetric space and let G be a graph. We say that G is the diametrical graph of (X, d) if X is the vertex set of G and the adjacency of vertices x and y is equivalent to the equality diam X = d(x, y). It is shown that a semimetric space (
Kononov, Yuriy Nikitovich +2 more
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