Results 1 to 10 of about 28 (28)

Connectivity with respect to α-discrete closure operators

open access: yesOpen Mathematics, 2022
We discuss certain closure operators that generalize the Alexandroff topologies. Such a closure operator is defined for every ordinal α>0\alpha \gt 0 in such a way that the closure of a set AA is given by closures of certain α\alpha -indexed sequences ...
Šlapal Josef
doaj   +1 more source

Path-induced closure operators on graphs for defining digital Jordan surfaces

open access: yesOpen Mathematics, 2019
Given a simple graph with the vertex set X, we discuss a closure operator on X induced by a set of paths with identical lengths in the graph. We introduce a certain set of paths of the same length in the 2-adjacency graph on the digital line ℤ and ...
Šlapal Josef
doaj   +1 more source

Galois connections between sets of paths and closure operators in simple graphs

open access: yesOpen Mathematics, 2018
For every positive integer n,we introduce and discuss an isotone Galois connection between the sets of paths of lengths n in a simple graph and the closure operators on the (vertex set of the) graph.
Šlapal Josef
doaj   +1 more source

Locally n-Connected Compacta and UVn-Maps

open access: yesAnalysis and Geometry in Metric Spaces, 2015
We provide a machinery for transferring some properties of metrizable ANR-spaces to metrizable LCn-spaces. As a result, we show that for completely metrizable spaces the properties ALCn, LCn and WLCn coincide to each other.
Valov V.
doaj   +1 more source

VHH antibody targeting the chemokine receptor CX3CR1 inhibits progression of atherosclerosis. [PDF]

open access: yesMAbs, 2020
Low S   +19 more
europepmc   +1 more source
Some of the next articles are maybe not open access.

Perfectness of Higson type compactifications

Tsukuba Journal of Mathematics, 2021
Kazuo Tomoyasu
exaly  

Connectivity and the L-fuzzy unit interval

Rocky Mountain Journal of Mathematics, 1982
S E Rodabaugh
exaly  

Home - About - Disclaimer - Privacy