Results 41 to 50 of about 981 (109)
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
doaj +1 more source
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
openaire +3 more sources
The asymptotic shape theorem for generalized first passage percolation
, 2010 We generalize the asymptotic shape theorem in first passage percolation on $\mathbb{Z}^d$ to cover the case of general semimetrics. We prove a structure theorem for equivariant semimetrics on topological groups and an extended version of the maximal ...
Björklund, Michael
core +1 more source
The Riemannian L^2 topology on the manifold of Riemannian metrics
, 2010 We study the manifold of all Riemannian metrics over a closed, finite-dimensional manifold. In particular, we investigate the topology on the manifold of metrics induced by the distance function of the L^2 Riemannian metric - so called because it induces
Clarke, Brian
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A Svarc-Milnor lemma for monoids acting by isometric embeddings
, 2010 We continue our programme of extending key techniques from geometric group theory to semigroup theory, by studying monoids acting by isometric embeddings on spaces equipped with asymmetric, partially-defined distance functions.
de la Harpe P. +4 more
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Fixed point theorems for semi-groups of self maps of semi-metric spaces
International Journal of Mathematics and Mathematical Sciences, 1998 We use selected semi-groups of self maps of a semi-metric space to obtain fixed point theorems for single maps and for families of mapstheorems which generalize results by Browder, Jachymski, Rhoades and Waiters, and others. A basic tool in our approach
G. Jungck
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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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source
Global sensitivity analysis of integrated assessment models with multivariate outputs
Risk Analysis, Volume 45, Issue 8, Page 2132-2156, August 2025.Abstract Risk assessments of complex systems are often supported by quantitative models. The sophistication of these models and the presence of various uncertainties call for systematic robustness and sensitivity analyses. The multivariate nature of their response challenges the use of traditional approaches.
Leonardo Chiani +3 more
wiley +1 more source