Results 41 to 50 of about 339 (176)
TAXON, Volume 75, Issue 4, August 2026.Abstract Baobab trees (Adansonia) are iconic members of Madagascar's biota that serve as emblems for the island's unique biodiversity. Despite this recognition, many questions remain regarding evolutionary relationships and species limits within the genus.
Nisa Karimi +3 more
wiley +1 more source
Pseudospectra of the direct sum of linear operators in ultrametric Banach spaces
Қарағанды университетінің хабаршысы. Математика сериясыIn this paper, a characterization of essential pseudospectra of bounded linear operators on ultrametric Banach spaces over a spherically complete field was given and the notions of pseudospectra and condition pseudospectra of the direct sum of linear ...
J. Ettayb
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A look at nonexpansive mappings in non-Archimedean vector spaces
Moroccan Journal of Pure and Applied Analysis, 2021 In a spherically complete ultrametric space every nonexpansive self-mapping T has a fixed point ̄x or a minimal invariant ball B(̄x, d(̄x, T(̄x)). We show how we can approximate this fixed center ̄x in a non-Archimedean vector space.
Lazaiz Samih
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TAXON, Volume 75, Issue 4, August 2026.Abstract Leucobryum (Leucobryaceae) is a genus of moss (Bryophyta) that has been poorly investigated in Africa, particularly in the western Indian Ocean region. This study integrates morphological and molecular data to revise the taxonomy of the genus in this area.
Quentin Dejonghe +4 more
wiley +1 more source
Percolation in an ultrametric space
Electronic Journal of Probability, 2013 Estudiamos la percolación en la red jerárquica de orden $N$ donde la probabilidad de conexión entre dos puntos separados por la distancia $k$ es de la forma $c_{k}/N^{k(1+\delta}, \delta \gr -1 $. Dado que la distancia es ultramétrica, existen diferencias significativas con la percolación en la red euclidiana. Consideramos tres regímenes: $\delta \lt 1
Donald A. Dawson, Luis G. Gorostiza
openaire +4 more sources
Museomic phylogenomics of Orthosiinae (Apocynaceae) integrating targeted sequencing and morphology
TAXON, Volume 75, Issue 4, August 2026.Abstract Museum collections offer valuable resources for phylogenetic research, especially in taxonomically challenging groups. Here, we present a phylogenetic study of the South American Apocynaceae subtribe Orthosiinae, based on sequencing 835 nuclear genes and chloroplast genomes from ~120 species using a family‐specific probe set and multiple ...
Yam M. Pineda +6 more
wiley +1 more source
Diversity and Distributions, Volume 32, Issue 8, August 2026.ABSTRACT Aim Conservation under the current global biodiversity crisis demands strategic prioritisation to maximise the impact of limited resources. This study aims to integrate evolutionary history, an often‐overlooked component of biodiversity, alongside extinction risk to identify priority species and regions, assessing both the feasibility and ...
J. Alexander Nieto Lawrence +3 more
wiley +1 more source
Rare Caudal Regeneration Anomalies in Geckos Are Associated With Global Solar Radiation Gradients
Journal of Biogeography, Volume 53, Issue 8, August 2026.ABSTRACT Aim Morphological abnormalities may reduce fitness in wild animals, making them ecologically relevant for conservation efforts. Anomalies, such as a bifurcation or a trifurcation of a regenerated gecko tail, can change locomotion, social signalling, and predator evasion, with potential effects on survival and reproductive success.
Lucas Rodriguez Forti +3 more
wiley +1 more source
On Approximately p-Wright Affine Functions in Ultrametric Spaces
Journal of Function Spaces and Applications, 2013 We prove some results for mappings taking values in ultrametric spaces and satisfying approximately a generalization of the equation of p-Wright affine functions. They are motivated by the notion of stability for functional equations.
Anna Bahyrycz +2 more
doaj +1 more source