Results 61 to 70 of about 11,792,067 (380)

Fixed point theory in terms of a metric and of an order relation

Fixed Point Theory, 2019
We consider a nonempty set X endowed with a metric d an order relation and an operator f : X → X, which satisfies two main assumptions: (1) f is generalized monotone with respect to ; (2) f is a (generalized) contraction with respect to d on a certain ...
A. Petruşel, I. Rus
semanticscholar   +1 more source

A new contribution to discontinuity at fixed point [PDF]

Fixed Point Theory, 2017
The aim of this paper is to obtain new solutions to the open question on the existence of a contractive condition which is strong enough to generate a fixed point but which does not force the map to be continuous at the fixed point.
Nihal Tacs, N. Ozgur
semanticscholar   +1 more source

Fixed Points of Isometries [PDF]

Nagoya Mathematical Journal, 1958
The purpose of this paper is to prove the followingTheorem. Let M be a Riemannian manifold of dimension n and let ξ be a Killing vector field (i.e., infinitesimal isometry) of M. Let F be the set of points x of M where ξ vanishes and let F = ∪ Vi, where the Vi’s are the connected components of F. Then (assuming F to be non-empty)
openaire   +4 more sources

On characterizations of fixed points [PDF]

International Journal of Mathematics and Mathematical Sciences, 2001
We give some necessary and sufficient conditions for the existence of fixed points of a family of self mappings of a metric space and we establish an equivalent condition for the existence of fixed points of a continuous compact mapping of a metric space.
Zeqing Liu, Shin Min Kang, Lili Zhang
openaire   +4 more sources

A Generalization of b-Metric Space and Some Fixed Point Theorems

, 2017
In this paper, inspired by the concept of b-metric space, we introduce the concept of extended b-metric space. We also establish some fixed point theorems for self-mappings defined on such spaces.
T. Kamran, Maria Samreen, Qurat Ul Ain
semanticscholar   +1 more source

The multiplicativity of fixed point invariants

, 2013
We prove two general factorization theorems for fixed-point invariants of fibrations: one for the Lefschetz number and one for the Reidemeister trace. These theorems imply the familiar multiplicativity results for the Lefschetz and Nielsen numbers of a ...
Citterio, Dold, Jiang, Kate Ponto, Lewis, May, Michael Shulman, Ponto, Ponto, Shulman, You   +10 more
core   +1 more source

Infrared fixed point in quantum Einstein gravity [PDF]

, 2012
We performed the renormalization group analysis of the quantum Einstein gravity in the deep infrared regime for different types of extensions of the model.
A Bonanno, A Bonanno, A Bonanno, A Codello, A Codello, A Codello, A Codello, A Eichhorn, A Eichhorn, B Halperin, C Wetterich, D Litim, DF Litim, DF Litim, DF Litim, DF Litim, DF Litim, DF Litim, E Bentivegna, E Manrique, H Osborn, HW Hamber, HW Hamber, I Antoniadis, I Nandori, J Alexandre, J Alexandre, J Berges, J Berges, J Berges, J Braun, J Polonyi, J Zinn-Justin, J-E Daum, J. Krizsan, K Fukushima, K Groh, K. Sailer, M Fabbrichesi, M Niedermaier, M Reuter, M Reuter, M Reuter, M Reuter, MR Niedermaier, N Tetradis, N Tsamis, O Lauscher, O Lauscher, O Lauscher, O Lauscher, O Lauscher, P Fischer, PF Machado, R Percacci, R Percacci, R Percacci, S Bornholdt, S Folkerts, S Nagy, S Nagy, S Nagy, S Weinberg, S. Nagy, SR Coleman, T Byrnes, U Harst, U Harst, V Pangon   +68 more
core   +2 more sources

On nonlinear classical and fractional order dynamical system addressing COVID-19

Results in Physics, 2021
This work studies a new SEIR type mathematical model for SARS-CoV-2. We show how immigration, protection, death rate, exposure, cure rate and interaction of infected people with healthy people affect the population.
Kamal Shah, Rahim Ud Din, Wejdan Deebani, Poom Kumam, Zahir Shah   +4 more
doaj   +1 more source

The KPZ fixed point [PDF]

Acta Mathematica, 2016
An explicit Fredholm determinant formula is derived for the multipoint distribution of the height function of the totally asymmetric simple exclusion process with arbitrary initial condition.
K. Matetski, J. Quastel, Daniel Remenik
semanticscholar   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source