Results 41 to 50 of about 1,082,995 (200)
Entropy, 2016 We present a new conceptual approach for modeling of fluid flows in random porous media based on explicit exploration of the treelike geometry of complex capillary networks.
Andrei Khrennikov +2 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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Forbidden four cycle, star graphs and isometric embeddings
Pracì Mìžnarodnogo Geometričnogo CentruWe prove the necessary and sufficient conditions under which ultrametric spaces of arbitrary infinite cardinality admit isometric embeddings into ultrametric spaces generated by labeled star graphs.
Olga Rovenska, Oleksiy Dovgoshey
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Hyperstability of the k-Cubic Functional Equation in Non-Archimedean Banach Spaces
Journal of Mathematics, 2020 Using the fixed point approach, we investigate a general hyperstability results for the following k-cubic functional equations fkx+y+fkx−y=kfx+y+kfx−y+2kk2−1fx, where k is a fixed positive integer ≥2, in ultrametric Banach spaces.
Youssef Aribou, Mohamed Rossafi
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Biological Diversity, EarlyView.The first inventory of ants from the Xisha Islands of the South China Sea was compiled, revealing 21 species: 70% native and 30% exotic. Anthropogenic disturbance primarily drove exotic colonization, whereas island area showed weak positive effects on species richness. Most ants were omnivorous, with key mutualistic and seed‐dispersal roles.
Hua‐Yan Chen +4 more
wiley +1 more source
, 2015 Ultrametric phylogeny used for running phylogenetic correlation ...
Anderson, Christopher N. +7 more
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Cladistics, EarlyView.Abstract The marronoid clade is a globally distributed, ecologically diverse group of spiders. It is an important faunal component in both natural and synanthropic environments, and even found in aquatic and extreme habitats such as desert salt flats. The systematics of the marronoid clade has been notoriously unstable due to the widespread character ...
Jonas O. Wolff +10 more
wiley +1 more source
Metrization of free groups on ultrametric spaces [PDF]
, 2010 We consider ultrametrizations of free topological groups of ultrametric spaces. A construction is defined that determines a functor in the category UMET1 of ultrametric spaces of diameter ⩽1 and nonexpanding maps. This functor is the functorial part of a
Zarichnyi, M., Savchenko, A.
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Metric and ultrametric spaces of resistances
Discrete Applied Mathematics, 2010 In 1987, \textit{A. D. Gvishiani} and \textit{V. A Gurvich} [``Metric and ultrametric spaces of resistances'', Russ. Math. Surv. 42, No. 6, 235--236 (1987); translation from Usp. Mat. Nauk 42, No. 6, 187--188 (1987; Zbl 0708.90028)] briefly reported results that established conditions under which effective resistances in an undirected graph satisfy a ...
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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
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