Results 71 to 80 of about 15,188 (171)

On some cardinal invariants of hyperspace with (C_0,C_1) Ochan type topology

open access: yesLietuvos Matematikos Rinkinys, 2012
In the article are examined some cardinal invariants of hyperspace with Ochan type topology.
Gintaras Praninskas
doaj   +1 more source

A good‐practice guide to solving and refining molecular organic crystal structures from laboratory powder X‐ray diffraction data

open access: yesActa Crystallographica Section C, Volume 81, Issue 10, Page 559-569, October 2025.
A step‐by‐step outline for academic and industrial practitioners determining molecular organic crystal structures from powder X‐ray diffraction data.This article focuses on a specific real‐space methodology for solving and refining molecular organic crystal structures, developed by the authors and collaborators.
Elena Kabova   +4 more
wiley   +1 more source

Hyperspaces of Superparacompact Spaces and Continuous Maps

open access: yesUniversal Journal of Mathematics and Applications, 2019
In the present paper we establish that the space $\exp_\beta X$ of compact subsets of a Tychonoff space $X$ is superparacompact iff $X$ is so.
Adilbek Zaitov   +1 more
doaj   +1 more source

Extension of Hyperspace Selections

open access: yes, 2023
In 1951, Ernest Michael wrote a definitive seminal article on hyperspaces raising a general question that became known as the hyperspace selection problem. The present paper contains some aspects of this problem, along with several open questions. Most of these considerations and questions are related to the usual map extension problem, but now in the ...
openaire   +3 more sources

Mitochondrial Dysfunction in Neurodegenerative Diseases

open access: yesMedComm, Volume 6, Issue 9, September 2025.
Overview of mitochondrial dysfunction in neurodegenerative diseases (NDDs). Mitochondrial dysfunction in NDDs involves impaired ATP synthesis, Ca2+ imbalance, oxidative stress, and apoptosis. Assessment methods integrate functional assays, omics, and imaging.
Chongyang Chen   +10 more
wiley   +1 more source

Sobre los continuos tipo θ y θn

open access: yesRevista Integración, 2015
En 1974 el Profesor R. W. FitzGerald definió los continuos tipo θ y θn. (Un continuo X es un continuo tipo θ (tipo θn, para algún número natural n) si para cada subcontinuo K de X, resulta que X \ K sólo tiene un número finito de componentes (X \ K ...
Sergio Macías
doaj  

Topological classification of the hyperspaces of polyhedral convex sets in normed spaces [PDF]

open access: yesМатематичні Студії, 2013
We prove that, for a normed space $X$ of dimension $dim(X)ge2$ the space $PConv_H(X)$ of non-empty polyhedral convexsubsets of $X$ endowed with the Hausdorff metric ishomeomorphic to the topological sum ${0}oplus |X^*|imes(IRoplus (IRimesarIR_+)oplus ...
I. V. Hetman
doaj  

On hyperspaces of polyhedra [PDF]

open access: yesProceedings of the American Mathematical Society, 1990
Let Q = [ − 1 , 1 ] ω Q = {[ - 1,1]^\omega } be the Hilbert cube and \[ Q f = { ( x
openaire   +2 more sources

Local Connectedness in Hyperspaces

open access: yesRocky Mountain Journal of Mathematics, 2006
\textit{W. Makuchowski} [Bull. Pol. Acad. Sci., Math. 47, No. 2, 119--126 (1999; Zbl 0929.54012)] has proved that if \(X\) is a Hausdorff compact space, then local connectedness and local arcwise connectedness of the hyperspace \(C(X)\) of all subcontinua of \(X\) and of the hyperspace \(2^X\) of all non-empty closed subsets of \(X\) are equivalent at ...
Charatonik, Janusz J.   +1 more
openaire   +3 more sources

Strong chain transitivity in hyperspaces of uniform spaces

open access: yesApplied General Topology
We apply topological definitions of strong chain transitivity and characterizetopological strong chain transitivity for the induced maps on hyperspaces ofuniform spaces.
Nooshin Darban Maghami   +2 more
doaj   +1 more source

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