Results 61 to 70 of about 701 (84)

Tripled and coincidence fixed point theorems for contractive mappings satisfying Φ-maps in partially ordered metric spaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this paper, we study some tripled fixed and coincidence point theorems for two mappings F : X × X × X → X and ɡ : X → X satisfying a nonlinear contraction based on ϕ-maps. Our results extend and improve many existing results in the literature.
Shatanawi Wasfi, Postolache Mihai, Mustafa Zead   +2 more
doaj   +1 more source

A Homotopy Theory for Maps Having Strongly Convexly Totally Bounded Ranges in Topological Vector Spaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
This paper presents Leray–Schauder alternatives and a topological transversality (homotopy) theorem for compact upper semicontinuos maps having (strongly) convexly totally bounded ranges.
O’Regan Donal
doaj   +1 more source

Existence results for an impulsive neutral integro-differential equations in Banach spaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
In this manuscript we investigate the existence of mild solution for a abstract impulsive neutral integro-differential equation by using semi-group theory and Krasnoselskii-Schaefer fixed point theorem in different approach.
Usha Venkatesh, Baleanu Dumitru, Arjunan Mani Mallika   +2 more
doaj   +1 more source

On Boyd-Wong type multivalued contractions and solvability of (k − ~)-Hilfer fractional differential inclusions

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this article, we introduce the Boyd-Wong type multivalued contractions and demonstrate that such mappings have a fixed point. Additionally, we look at the solvability of a few (k – ~)-Hilfer initial value fractional differential inclusions of order n −
Paunovic Marija, Mohammadi Babak, Parvaneh Vahid   +2 more
doaj   +1 more source

On Hilbert Functions of Points in Projective Space and Structure of Graded Modules

, 2018
In this paper, we investigate the relationship between the Hilbert functions and the associated properties of the graded modules. To attain this, we construct the graded modules from the sets of points in projective space, $\mathbb{P}_k^n$ .
Mgani, Damas Karmel, Mwanzalima, Makungu
core  

A multivalued version of Krasnoselskii’s theorem in generalized Banach spaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
The purpose of this paper is to extend Krasnoselskii’s fixed point theorem to the case of generalized Banach spaces for multivalued operators. As application, we will give an existence result for a system of Fredholm-Volterra type differential inclusions.
Petre Ioan-Radu
doaj   +1 more source

Variations of generalized weak contractions in partially ordered b-metric space. [PDF]

BMC Res Notes, 2022
Rao NS, Kalyani K.
europepmc   +1 more source

A Short And Constructive Proof of Tarski's Fixed-Point Theorem [PDF]

I give short and constructive proofs of Tarski's fixed-point theorem, and of a much-used extension of Tarski's fixed-point theorem to set- valued maps.tarski, fixed-point theorem, supermodular, supermodular games, strategic complementarities, equilibrium
Federico Echenique
core  

Fixed point results of weakly contraction mappings in partially ordered b-metric spaces. [PDF]

BMC Res Notes, 2022
Kalyani K, Seshagiri Rao N.
europepmc   +1 more source

Some novel mathematical analysis on the fractional-order 2019-nCoV dynamical model. [PDF]

Math Methods Appl Sci, 2022
Owoyemi AE, Sulaiman IM, Kumar P, Govindaraj V, Mamat M.   +4 more
europepmc   +1 more source