Results 31 to 40 of about 153 (127)
Caristi Type Coincidence Point Theorem in Topological Spaces
Journal of Applied Mathematics, 2013 A generalized Caristi type coincidence point theorem and its equivalences in the setting of topological spaces by using a kind of nonmetric type function are obtained.
Jiang Zhu, Lei Wei, Cheng-Cheng Zhu
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Groups acting on semimetric spaces and quasi-isometries of monoids [PDF]
Transactions of the American Mathematical Society, 2012 We study groups acting by length-preserving transformations on spaces equipped with asymmetric, partially-defined distance functions. We introduce a natural notion of quasi-isometry for such spaces and exhibit an extension of the Švarc-Milnor lemma to this setting.
Gray, Robert, Kambites, Mark
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Advances in Mathematical Physics, Volume 2020, Issue 1, 2020., 2020 In this paper, we present a common fixed point result for a pair of mappings defined on a b‐metric space, which satisfies quasi‐contractive inequality with nonlinear comparison functions. An application in solving a class of integral equations will support our results.
Zoran D. Mitrović +5 more
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Cauchy sequences in semimetric spaces [PDF]
Proceedings of the American Mathematical Society, 1972 As the main result we prove that every semimetrizable space has a semimetric for which every convergent sequence has a Cauchy subsequence. This result is used to show that a T
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A contraction principle in semimetric spaces
, 2014 A branch of generalizations of the Banach Fixed Point Theorem replaces contractivity by a weaker but still effective property. The aim of the present note is to extend the contraction principle in this spirit for such complete semimetric spaces that fulfill an extra regularity property. The stability of fixed points is also investigated in this setting.
Bessenyei, Mihály, Páles, Zsolt
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Alternative Approaches for Estimating Highest‐Density Regions
International Statistical Review, Volume 94, Issue 1, Page 97-120, April 2026.Summary Among the variety of statistical intervals, highest‐density regions (HDRs) stand out for their ability to effectively summarise a distribution or sample, unveiling its distinctive and salient features. An HDR represents the minimum size set that satisfies a certain probability coverage, and current methods for their computation require ...
Nina Deliu, Brunero Liseo
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Journal of Mathematics, Volume 2026, Issue 1, 2026.In this paper, we revisit the structure of multiplicative metric spaces and investigate analytic notions such as convergence, Cauchy sequences, boundedness, and density within this framework. We extend these concepts to their statistical counterparts, including statistical convergence, statistical Cauchy sequences, statistical boundedness, and ...
Listán García María C +4 more
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Existence of a non‐stationary equilibrium in search‐and‐matching models: TU and NTU
Theoretical Economics, Volume 20, Issue 4, Page 1411-1460, November 2025.This paper proves the existence of a non‐stationary equilibrium in the canonical search‐and‐matching model with heterogeneous agents. Non‐stationarity entails that the number and characteristics of unmatched agents evolve endogenously over time.
Christopher Sandmann, Nicolas Bonneton
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Probabilistic verification in mechanism design
Theoretical Economics, Volume 20, Issue 4, Page 1247-1284, November 2025.We introduce a model of probabilistic verification in mechanism design. The principal elicits a message from the agent and then selects a test to give the agent. The agent's true type determines the probability with which he can pass each test. We characterize whether each type has an associated test that best screens out all other types.
Ian Ball, Deniz Kattwinkel
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Fixed point results for set-contractions on semi-metric space with a directed graph
Applied General TopologyIn this paper, fixed point results with respect to generalized rational contractive mappings in semi-metric spaces endowed with a directed graph are proved. Some examples are provided to illustrate the results.
Talat Nazir +3 more
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