Results 21 to 30 of about 7,273 (258)

On the approximation of bounded functions by trigonometric polynomials in Hausdorff metric [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2023
The article discusses a method for constructing a spline function to obtain estimates that are exact in order to approximate bounded functions by trigonometric polynomials in the Hausdorff metric.
Sadekova, Ekaterina H.
doaj   +1 more source

GAN‐LSTM‐3D: An efficient method for lung tumour 3D reconstruction enhanced by attention‐based LSTM

open access: yesCAAI Transactions on Intelligence Technology, EarlyView., 2023
Abstract Three‐dimensional (3D) image reconstruction of tumours can visualise their structures with precision and high resolution. In this article, GAN‐LSTM‐3D method is proposed for 3D reconstruction of lung cancer tumours from 2D CT images. Our method consists of three phases: lung segmentation, tumour segmentation, and tumour 3D reconstruction. Lung
Lu Hong   +12 more
wiley   +1 more source

Branching Geodesics of the Gromov-Hausdorff Distance

open access: yesAnalysis and Geometry in Metric Spaces, 2022
In this paper, we first evaluate topological distributions of the sets of all doubling spaces, all uniformly disconnected spaces, and all uniformly perfect spaces in the space of all isometry classes of compact metric spaces equipped with the Gromov ...
Ishiki Yoshito
doaj   +1 more source

Fixed point results via a Hausdorff controlled type metric

open access: yesAdvances in Difference Equations, 2020
In this paper, we establish that every controlled metric space (X,dα) $(X, d_{\alpha })$ induces a Hausdorff controlled metric (Hα,CLD(X)) $(\textit{H}_{\alpha }, \textit{CLD}(X))$ on the class of closed subsets of X which is also complete if (X,dα) $(X,
Nayab Alamgir   +3 more
doaj   +1 more source

Two Dimensional Yau-Hausdorff Distance with Applications on Comparison of DNA and Protein Sequences. [PDF]

open access: yesPLoS ONE, 2015
Comparing DNA or protein sequences plays an important role in the functional analysis of genomes. Despite many methods available for sequences comparison, few methods retain the information content of sequences.
Kun Tian   +5 more
doaj   +1 more source

Chordal Hausdorff Convergence and Quasihyperbolic Distance

open access: yesAnalysis and Geometry in Metric Spaces, 2020
We study Hausdorff convergence (and related topics) in the chordalization of a metric space to better understand pointed Gromov-Hausdorff convergence of quasihyperbolic distances (and other conformal distances).
Herron David A.   +2 more
doaj   +1 more source

The hausdorff metric and measurable selections

open access: yesTopology and its Applications, 1985
We contruct measurable selections for closed set-valued maps into arbitrary complete metric spaces. We do not need to make any separability assumptions. We view the set-valued maps as point-valued maps into the hyperspace and our measurability assumptions are the usual kinds of measurability of point-valued maps in this setting.
Himmelberg, C.J.   +2 more
openaire   +1 more source

Gromov-Hausdorff metric [PDF]

open access: yes, 2022
In this bachelor's thesis we define the notion of Hausdorff metric and Gromov-Hausdorff metric. We will define both metrics in several different ways and then we will show that these definitions are equivalent.
Horský, Miroslav
core  

Weak Partial b-Metric Spaces and Nadler’s Theorem

open access: yesMathematics, 2019
The purpose of this paper is to define the notions of weak partial b-metric spaces and weak partial Hausdorff b-metric spaces along with the topology of weak partial b-metric space. Moreover, we present a generalization of Nadler’s theorem by using
Tanzeela Kanwal   +3 more
doaj   +1 more source

A Simple Proof of Dvoretzky-Type Theorem for Hausdorff Dimension in Doubling Spaces

open access: yesAnalysis and Geometry in Metric Spaces, 2022
The ultrametric skeleton theorem [Mendel, Naor 2013] implies, among other things, the following nonlinear Dvoretzky-type theorem for Hausdorff dimension: For any 0 < β < α, any compact metric space X of Hausdorff dimension α contains a subset which is ...
Mendel Manor
doaj   +1 more source

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