Results 61 to 70 of about 5,105,361 (177)
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
wiley +1 more source
Implications between generalized convexity properties of real functions
, 2015 Motivated by the well-known implications among $t$-convexity properties of real functions, analogous relations among the upper and lower $M$-convexity properties of real functions are established.
Kiss, Tibor, Páles, Zsolt
core +1 more source
Convergence in probabilistic semimetric spaces
Rocky Mountain Journal of Mathematics, 1988 A probabilistic semimetric space (S,F) is a set S together with a function F defined on \(S\times S\) with values in the space \(\Delta^+\), which is a space of real-valued functions, satisfying some weak assumptions resembling those for a metric except for the triangular inequality.
openaire +3 more sources
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
wiley +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
wiley +1 more source
A contraction principle in semimetric spaces
, 2014 A branch of generalizations of the Banach Fixed Point Theorem replaces contractivity by a weaker but still effective property. The aim of the present note is to extend the contraction principle in this spirit for such complete semimetric spaces that fulfill an extra regularity property. The stability of fixed points is also investigated in this setting.
Bessenyei, Mihály, Páles, Zsolt
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Best constants for metric space inversion inequalities
, 2013 For every metric space (X, d) and origin o ∈ X, we show the inequality Io(x, y) ≤ 2do(x, y), where Io(x, y) = d(x, y)/d(x, o)d(y, o) is the metric space inversion semimetric, do is a metric subordinate to Io, and x, y ∈ X \ {o} The constant 2 is best ...
S. Buckley, Safia Hamza
semanticscholar +1 more source
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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Generalized metrics and Caristi’s theorem
, 2013 A ‘generalized metric space’ is a semimetric space which does not satisfy the triangle inequality, but which satisfies a weaker assumption called the quadrilateral inequality.
W. A. Kirk, N. Shahzad
semanticscholar +1 more source
Barisan Cauchy pada Ruang Semimetrik Terbatas
JOSTECH: Journal of Science and TechnologySemimetric 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.
I. D. Rianjaya +2 more
semanticscholar +1 more source