Results 161 to 170 of about 1,082,995 (200)

Ultrametric spaces and logic programming [PDF]

open access: yesThe Journal of Logic Programming, 2000
Summary: We prove a very general multivalued fixed point theorem for ultrametric spaces which at the same time is a generalization of the multivalued fixed point theorem of Khamsi, Kreinovich and Misane for generalized metric spaces and our (singlevalued) fixed point theorem for ultrametric spaces.
Paulo Ribenboim
exaly   +3 more sources

Wavelets on ultrametric spaces [PDF]

open access: yesApplied and Computational Harmonic Analysis, 2005
The authors consider ultrametric spaces with a metric \(| xy| \) satisfying the strong triangle inequality \(| ab| \leq\max(| ac| ,| cd| )\) for all \(c\). They construct measures in ultrametric spaces and introduce bases in quadratically integrable (complex valued) function spaces.
S V Kozyrev, A Yu Khrennikov
exaly   +3 more sources

Constructions of Urysohn Universal Ultrametric Spaces [PDF]

open access: yesP-Adic Numbers, Ultrametric Analysis, and Applications, 2023
In this paper, we give new constructions of Urysohn universal ultrametric spaces. We first characterize a Urysohn universal ultrametric subspace of the space of all continuous functions whose images contain the zero, from a zero-dimensional compact Hausdorff space without isolated points into the space of non-negative real numbers equipped with the ...
Ishiki, Yoshito
exaly   +5 more sources

Ultrametric Preserving Functions and Weak Similarities of Ultrametric Spacesāˆ—^* [PDF]

open access: yesP-Adic Numbers, Ultrametric Analysis, and Applications, 2021
18 pages, 1 ...
Ruslan Shanin
exaly   +4 more sources

Polish ultrametric Urysohn spaces and their isometry groups [PDF]

open access: yesTopology and Its Applications, 2011
In this paper we give some new constructions of Polish ultrametric Urysohn spaces and investigate the universality properties of their isometry groups.
Su Gao
exaly   +2 more sources

Some fixed point results in ultrametric spaces [PDF]

open access: yesTopology and Its Applications, 2012
Geometrically, ultrametric spaces and hyperconvex metric spaces are sharply distinct. However spherically complete ultrametric space and hyperconvex metric space share striking similarities. Several of these similarities are discussed here.
Naseer Shahzad
exaly   +2 more sources

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