Results 11 to 20 of about 9,340 (278)

ON THE HAUSDORFF MEASURE OF CERTAIN PLANE SET PROJECTIONS

open access: yesPesquimat, 2014
A characterization of plane sets whose projection have zero Hausdorff measure is given. This is obtained through the study of an angular density introduced first by Marstrand [2].
Carlos Arnoldo Morales Rojas
doaj   +3 more sources

On the Hausdorff Measure of Shrinking Target Sets on Self-Conformal Sets

open access: yes, 2021
In this article, we study the Hausdorff measure of shrinking target sets on self-conformal sets. The Hausdorff dimension of the sets we are interested in here was established by Hill and Velani in 1995.
Allen, Demi   +2 more
core   +2 more sources

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

Translating Hausdorff is hard: fine-grained lower bounds for Hausdorff distance under translation

open access: yesJournal of Computational Geometry, 2022
Computing the similarity of two point sets is a ubiquitous task in medical imaging, geometric shape comparison, trajectory analysis, and many more settings.
Karl Bringmann, André Nusser
doaj   +1 more source

Something About h - Measures of Sets in Plane

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this article we estimate the Hausdorff h-measures of the graphs of some functions, for different measure functions.
Bărbulescu Alina
doaj   +1 more source

Exceptional families of measures on Carnot groups

open access: yesAnalysis and Geometry in Metric Spaces, 2023
We study the families of measures on Carnot groups that have vanishing pp-module, which we call Mp{M}_{p}-exceptional families. We found necessary and sufficient Conditions for the family of intrinsic Lipschitz surfaces passing through a common point to ...
Franchi Bruno, Markina Irina
doaj   +1 more source

Haar Measure for non-Hausdorff Locally Compact Groups [PDF]

open access: yesAdvances in Group Theory and Applications
The paper describes two possible ways of extending the definition of Haar measure to non-Hausdorff locally compact groups. The first one forces compact sets to be measurable: with this construction, a counterexample to the existence of the Haar measure ...
Lisa Valentini
doaj   +1 more source

Nonstandard Measure Theory-Hausdorff Measure [PDF]

open access: yesProceedings of the American Mathematical Society, 1977
In this paper it is shown that the Hausdorff measures λ
openaire   +2 more sources

Intersections of Projections and Slicing Theorems for the Isotropic Grassmannian and the Heisenberg group

open access: yesAnalysis and Geometry in Metric Spaces, 2020
This paper studies the Hausdorff dimension of the intersection of isotropic projections of subsets of ℝ2n, as well as dimension of intersections of sets with isotropic planes. It is shown that if A and B are Borel subsets of ℝ2n of dimension greater than
Román-García Fernando
doaj   +1 more source

On the equality of Hausdorff measure and Hausdorff content [PDF]

open access: yesJournal of Fractal Geometry, Mathematics of Fractals and Related Topics, 2015
We are interested in situations where the Hausdor measure and Hausdorff content of a set are equal in the critical dimension. Our main result shows that this equality holds for any subset of a self-similar set corresponding to a nontrivial cylinder of an irreducible subshift of finite type, and thus also for any self-similar or graph-directed self ...
Farkas, Ábel, Fraser, Jonathan M
openaire   +3 more sources

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