Results 11 to 20 of about 149 (148)
Fixed points, selections and common fixed points for nonexpansive-type mappings
Journal of Mathematical Analysis and Applications, 2011 AbstractWe study the existence of fixed points in the context of uniformly convex geodesic metric spaces, hyperconvex spaces and Banach spaces for single and multivalued mappings satisfying conditions that generalize the concept of nonexpansivity. Besides, we use the fixed point theorems proved here to give common fixed point results for commuting ...
Rafa Espínola +2 more
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On common fixed points of linear contractions [PDF]
Proceedings of the American Mathematical Society, 1990 In this note we give a short and direct proof of a result about convex semigroups of linear contractions.
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Common fixed points of compatible mappings [PDF]
International Journal of Mathematics and Mathematical Sciences, 1988 In this paper, we present a common fixed point theorem for compatible mappings, which extends the results of Ding, Diviccaro‐Sessa and the third author.
Y.J. Cho, Gerald Jungck, Shin Min Kang
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Commuting functions with no common fixed point [PDF]
Transactions of the American Mathematical Society, 1969 Introduction. Let f and g be continuous functions mapping the unit interval I into itself which commute under functional composition, that is, f(g(x))=g(f(V)) for all x in I. In 1954 Eldon Dyer asked whetherf and g must always have a common fixed point, meaning a point z in I for which f(z) =z=g(z). A. L.
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General Common Fixed Point Theorems and Applications [PDF]
Journal of Applied Mathematics, 2012 The main result is a common fixed point theorem for a pair of multivalued maps on a complete metric space extending a recent result of Đorić and Lazović (2011) for a multivalued map on a metric space satisfying Ćirić‐Suzuki‐type‐generalized contraction.
Singh, Shyam Lal +3 more
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Fixed Points and Common Fixed Points for Orbit-Nonexpansive Mappings in Metric Spaces
Mediterranean Journal of Mathematics, 2023 AbstractIn this paper, we introduce an interlacing condition on the elements of a family of operators that allows us to gather together a number of results on fixed points and common fixed points for single and families of mappings defined on metric spaces.
Espínola, Rafael +2 more
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Common Fixed Points and Best Approximation
Journal of Approximation Theory, 1996 AbstractWe prove a common fixed-point theorem generalizing results of Dotson and Habiniak. Using this result, we extend, generalize, and unify well known results on fixed points and common fixed points of best approximation.
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Effects of chronic browsing on life‐history traits of an irruptive large herbivore population
Population Ecology, EarlyView.This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji +9 more
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Population Ecology, EarlyView.This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier +6 more
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Common fixed point theorems for compatible mappings [PDF]
International Journal of Mathematics and Mathematical Sciences, 1994 By using a compatibility condition due to Jungck we establish some common fixed point theorems for four mappings on complete and compact metric spaces These results also generalize a theorem of Sharma and Sahu.
Taş, K., Telci, M., Fisher, Brian
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