Results 81 to 90 of about 6,713,503 (368)

Fundamental Characteristics of the Product-Operated Metric Spaces

open access: yesAxioms
In the field of metric fixed point theory, there are several generalized or modified types of metric space. One such type is called multiplicative metric space. It was initially introduced as a modified version of the metric space, but was later found to
Muhammad Usman Ali   +3 more
doaj   +1 more source

Corona metric spaces: Basic properties, universal lines, and the metric dimension

open access: yesAIMS Mathematics, 2022
In this article, we introduce the study of corona metric space. After discussing some basic properties of these metric spaces, such as completeness, boundedness, compactness and separability, we provide a necessary and sufficient condition for the ...
Juan Alberto Rodríguez-Velázquez
doaj   +1 more source

Bounded-Distortion Metric Learning [PDF]

open access: yes, 2015
Metric learning aims to embed one metric space into another to benefit tasks like classification and clustering. Although a greatly distorted metric space has a high degree of freedom to fit training data, it is prone to overfitting and numerical ...
Jia, Jiaya   +4 more
core  

Metric and Symmetric Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
In this paper we give an alternative proof, without reference to Urysohn’s lemma, of the metrization theorem of Bing [2], Nagata [6], and Smirnov [8] via the theory of symmetric spaces as developed by H. Martin in [5].
openaire   +2 more sources

Dislocated metric space to metric spaces with some fixed point theorems

open access: yes, 2013
In this paper, we notice the notions metric-like space and dislocated metric space are exactly the same. After this historical remark, we discuss the existence and uniqueness of a fixed point of a cyclic mapping in the context of metric-like spaces.
E. Karapınar, P. Salimi
semanticscholar   +1 more source

On the conformal gauge of a compact metric space [PDF]

open access: yes, 2012
In this article we study the Ahlfors regular conformal gauge of a compact metric space $(X,d)$, and its conformal dimension $\mathrm{dim}_{AR}(X,d)$. Using a sequence of finite coverings of $(X,d)$, we construct distances in its Ahlfors regular conformal
Matias Carrasco Piaggio
semanticscholar   +1 more source

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

open access: yesPopulation Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa   +2 more
wiley   +1 more source

Fuzzy b-Metric Spaces: Fixed Point Results for ψ-Contraction Correspondences and Their Application

open access: yesAxioms, 2020
In this paper we introduce the concepts of ψ -contraction and monotone ψ -contraction correspondence in “fuzzy b -metric spaces” and obtain fixed point results for these contractive mappings.
Mujahid Abbas   +2 more
doaj   +1 more source

Retracts in Metric Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1980
In this paper we define S-contractibility and two classes of spaces connected with this notion. A space X is said to be S-contractible provided that S is a function S : X × ⟨ 0 , 1 ⟩ × X ( x , α , y ) ↦ S
openaire   +2 more sources

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

open access: yesPopulation Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

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