Results 101 to 110 of about 1,082,995 (200)

Non-ultrametric phylogenetic trees shed new light on Neanderthal introgression. [PDF]

Org Divers Evol, 2023
Tozzi A.
europepmc   +1 more source

Stability of Coupled Biquadratic Functional Equations Involving Four Mappings in Non-Archimedean Normed Spaces

Journal of Mathematics
This paper investigates the Hyers–Ulam stability of a class of generalized biquadratic functional equations involving four unknown mappings in non-Archimedean normed spaces. We analyze a coupled system that simultaneously incorporates additive, quadratic,
Janyarak Tongsomporn, Sorravit Phonrakkhet   +1 more
doaj   +1 more source

Generalized ultrametric spaces : completion, topology, and powerdomains via the Yoneda embedding [PDF]

, 1995
Generalized ultrametric spaces are a common generalization of preorders and ordinary ultrametric spaces (Lawvere 1973, Rutten 1995). Combining Lawvere's (1973) enriched-categorical and Smyth' (1987, 1991) topological view on generalized (ultra)metric ...
Bonsangue, M.M. (Marcello), Breugel, F. van, Rutten, J.J.M.M. (Jan)   +2 more
core   +2 more sources

Center of Distances of Ultrametric Spaces Generated by Labeled Trees

Mathematics
The center of distances of a metric space (X,d) is the set C(X) of all t∈R+ for which the equation d(x,p)=t has a solution for each p∈X. We prove that the equalities C(X)={0} or C(X)={0,diamX} hold if (X,d) is an ultrametric space generated by labeled ...
Oleksiy Dovgoshey, Olga Rovenska
doaj   +1 more source

A p-Adic Model of Quantum States and the p-Adic Qubit. [PDF]

Entropy (Basel), 2022
Aniello P, Mancini S, Parisi V.
europepmc   +1 more source

Some properties of finite ultrametric spaces [PDF]

, 2006
The spectrum of finite ultrametric spaces is studied. It is proved that every finite ultrametric space can be realized as a space with the tree metric. The proof is constructive.Досліджується спектр скінченних ультраметричних просторів.
Олійник, Богдана
core  

Some fixed point results on ultrametric spaces endowed with a graph

Demonstratio 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, Özkapu Aybala Sevde, Öztürk Mahpeyker   +2 more
doaj   +1 more source

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

Genome Biol Evol, 2023
Penn MJ, Scheidwasser N, Penn J, Donnelly CA, Duchêne DA, Bhatt S.   +5 more
europepmc   +1 more source

Minimum spanning paths and Hausdorff distance in finite ultrametric spaces

It is shown that a minimum weight spanning tree of a finite ultrametric space can be always found in the form of path. As a canonical representing tree such path uniquely defines the whole space and, moreover, it has much more simple structure.
Petrov, Evgeniy
core   +1 more source

The distance backbone of directed networks. [PDF]

Complex Netw Appl, 2023
Costa FX, Correia RB, Rocha LM.
europepmc   +1 more source