Results 41 to 50 of about 1,197 (175)
Quantum ultra-walks: Walks on a line with hierarchical spatial heterogeneity
Physical Review Research, 2020 We discuss the model of a one-dimensional, discrete-time walk on a line with spatial heterogeneity in the form of a variable set of ultrametric barriers.
Stefan Boettcher
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Nested Hoare Triples and Frame Rules for Higher-order Store [PDF]
Logical Methods in Computer Science, 2011 Separation logic is a Hoare-style logic for reasoning about programs with heap-allocated mutable data structures. As a step toward extending separation logic to high-level languages with ML-style general (higher-order) storage, we investigate the ...
Jan Schwinghammer +3 more
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Journal of Fish Biology, EarlyView.Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Taina Barbosa De Souza +6 more
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Results on the Existence and Convergence of Best Proximity Points
Fixed Point Theory and Applications, 2010 We first consider a cyclic φ-contraction map on a reflexive Banach space X and provide a positive answer to a question raised by Al-Thagafi and Shahzad on the existence of best proximity points for cyclic φ-contraction maps in reflexive ...
Ali Abkar, Moosa Gabeleh
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Multi-scale clustering by building a robust and self correcting ultrametric topology on data points. [PDF]
PLoS ONE, 2013 The advent of high-throughput technologies and the concurrent advances in information sciences have led to an explosion in size and complexity of the data sets collected in biological sciences.
Hsieh Fushing +4 more
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Ecology and Evolution, Volume 16, Issue 8, August 2026.We evaluated adaptation to torpor and hibernation in the genus Dromiciops by comparing it with both torpid and non‐torpid marsupials, and investigated divergent selection signals between its two species. For the ancestral node, we identified positive selection in the genes PFKFB2, LAMP3, OTX1, and RAPSN, alongside an enrichment of pathways potentially ...
Elisa Gonzalez‐Ugalde +7 more
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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
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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
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Hyperbolic Metric Spaces and Stochastic Embeddings
Forum of Mathematics, SigmaStochastic embeddings of finite metric spaces into graph-theoretic trees have proven to be a vital tool for constructing approximation algorithms in theoretical computer science.
Chris Gartland
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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
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