Results 91 to 100 of about 339 (176)

Some fixed point results on ultrametric spaces endowed with a graph

open access: yesDemonstratio Mathematica
The present article deals with new fixed point theorems by means of GG-strongly contractive maps. The research findings are demonstrated in a spherically complete ultrametric space with a graph for single-valued mappings. The special cases of the results
Acar Özlem   +2 more
doaj   +1 more source

Leaping through Tree Space: Continuous Phylogenetic Inference for Rooted and Unrooted Trees. [PDF]

open access: yesGenome Biol Evol, 2023
Penn MJ   +5 more
europepmc   +1 more source

The distance backbone of directed networks. [PDF]

open access: yesComplex Netw Appl, 2023
Costa FX, Correia RB, Rocha LM.
europepmc   +1 more source

Trees and ultrametric spaces: a categorical equivalence

open access: yesAdvances in Mathematics, 2004
A well-known correspondence between infinite trees and ultrametric spaces exists, which takes into account the end space of the tree. The present paper deeply analyzes this correspondence in terms of categories, by introducing suitable categories that capture the geometry of trees at infinity and the micro-geometry of ultrametric spaces.
openaire   +2 more sources

Guarded Language Operators as Contractions in a Length-Based Ultrametric Space

open access: yesMathematics
We study a class of wrapping operators acting on the space of formal languages over a fixed finite alphabet. The underlying space is equipped with a length-based ultrametric, in which two languages are close whenever they coincide on all sufficiently ...
Hristo Hristov   +3 more
doaj   +1 more source

Ultrametric Structures and Norm-Based p-Adic Operations for Hierarchical and Robust Information Processing

open access: yesMathematics
In this article, we propose a non-archimedean framework for information processing based on the arithmetic and geometry of p-adic numbers. Exploiting the ultrametric structure of Qp, we introduce norm-based p-adic operations inspired by classical logical
Anselmo Torresblanca-Badillo
doaj   +1 more source

On spaces of *-measures on ultrametric spaces

open access: yesVisnyk Lvivskogo Universytetu. Seriya Mekhaniko-Matematychna, 2020
Khrystyna Sukhorukova   +1 more
openaire   +2 more sources

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