Browsing by Author "Kamran, Tayyab"

Now showing 1 - 10 of 10

Citation - WoS: 16
Citation - Scopus: 31
An Approach To Existence of Fixed Points of Generalized Contractive Multivalued Mappings of Integral Type Via Admissible Mapping
(Hindawi Ltd, 2014) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
We investigate the existence of a fixed point of certain contractive multivalued mappings of integral type by using the admissible mapping. Our results generalize the several results on the topic in the literature involving Branciari, and Feng and Liu. We also construct some examples to illustrate our results.
Citation - WoS: 6
Citation - Scopus: 8
Discussion on α-strictly Contractive Nonself Multivalued Maps
(Springer Singapore Pte Ltd, 2016) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we introduce the notions of alpha-contractive condition and strict alpha-admissibility for nonself multivalued mappings. By using these notions, we prove fixed point theorems for nonself multivalued mappings. We also construct an example to support our result.
Citation - WoS: 6
Citation - Scopus: 6
Existence of Best Proximity Points for Controlled Proximal Contraction
(Springer international Publishing Ag, 2015) Kiran, Quanita; Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we investigate the sufficient condition for the existence of best proximity points for non-self-multivalued mappings. Additionally, we discuss the stability theorem for such mappings. Our results improve and generalize some existing results on the topic in the literature, in particular, the results of Lim and of Abkar and Gabeleh.
Citation - WoS: 1
EXISTENCE OF FIXED POINTS FOR NEW PRESIC TYPE MULTIVALUED OPERATORS
(Yokohama Publ, 2017) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we shall generalize the convergence theorem introduced by Presic in 1965, by introducing the notions of alpha-Presic type contractive multivalued operators. We shall also construct some examples to prove the generality of our results.
Citation - WoS: 13
Citation - Scopus: 17
Fixed Point of Α-Ψ Type Mappings in Uniform Spaces
(Springer international Publishing Ag, 2014) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we shall investigate the existence and uniqueness of a fixed point of alpha-psi-contractive mappings in the context of uniform spaces. We shall also prove some common fixed point theorems by introducing the notion of alpha-admissible pairs. We shall construct some examples to support our novel results.
Citation - WoS: 4
Citation - Scopus: 5
Fixed Point Theorems in Uniform Space Endowed With Graph
(Univ Miskolc inst Math, 2017) Ali, Muhammad Usman; Fahimuddin; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we shall introduce the concepts of F-G-contraction and psi(G)-contraction in uniform space endowed with graph to investigate the existence of a fixed point of mappings satisfying these notions. We shall also introduce a common fixed point theorem for pair of mappings satisfying the notion of psi(G)-contraction in uniform space endowed with graph.
Citation - WoS: 19
Citation - Scopus: 17
Further Discussion on Modified Multivalued Α_*-ψ-contractive Type Mapping
(Univ Nis, Fac Sci Math, 2015) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we investigate the existence of a fixed point for modified multivalued alpha(*)-psi-contractive type mapping in the context of complete metric space. We also construct some examples to illustrate the main result. Our results extend, improve and generalize the results on the topic in the literature.
Citation - WoS: 29
Citation - Scopus: 34
A New Approach To (α, Ψ)-Contractive Nonself Multivalued Mappings
(Springeropen, 2014) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we introduce the notions of alpha-admissible and alpha-psi-contractive type condition for nonself multivalued mappings. We establish fixed point theorems using these new notions along with a new condition. Moreover, we have constructed examples to show that our new condition is different from the corresponding existing conditions in the literature.
Citation - WoS: 45
Citation - Scopus: 47
(α, ψ, ξ)-contractive multivalued mappings
(Springer international Publishing Ag, 2014) Ali, Muhammad Usman; Kamran, Tayyab; Karapinar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we introduce the notion of (alpha, psi, xi)-contractive multivalued mappings to generalize and extend the notion of alpha-psi-contractive mappings to closed valued multifunctions. We investigate the existence of fixed points for such mappings. We also construct an example to show that our result is more general than the results of alpha-psi-contractive closed valued multifunctions.
(α,ψ, ξ )-contractive multivalued mappings
(2014) Ali, Muhammed Usman; Kamran, Tayyab; Karapınar, Erdal; Mathematics; 02. School of Arts and Sciences; 01. Atılım University
In this paper, we introduce the notion of (α,ψ, ξ )-contractive multivalued mappings to generalize and extend the notion of α-ψ-contractive mappings to closed valued multifunctions. We investigate the existence of fixed points for such mappings. We also construct an example to show that our result is more general than the results of α-ψ-contractive closed valued multifunctions.