Yazar "Altun, Ishak" için listeleme
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Feng-Liu type fixed point results for multivalued mappings on JS-metric spaces
Altun, Ishak; Al Arifi, Nasir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem (Int Scientific Research Publications, 2016)In this paper, we present a fixed point theorem for multivalued mappings on generalized metric space in the sense of Jleli and Samet [M. Jleli, B. Samet, Fixed Point Theory Appl., 2015 (2015), 61 pages]. In fact, we obtain ... -
Fixed point and common fixed point theorems on ordered cone metric spaces
Altun, Ishak; Damjanovic, Bosko; Djoric, Dragan (Pergamon-Elsevier Science Ltd, 2010)In the present work, some fixed point and common fixed point theorems for self-maps on ordered cone metric spaces, where the cone is not necessarily normal, are proved. (C) 2009 Elsevier Ltd. All rights reserved. -
Fixed point and homotopy results for multivalued maps satisfying an implicit relation
Altun, Ishak (Birkhauser Verlag Ag, 2011)We present some common fixed point theorems for multivalued maps satisfying an implicit relation on complete metric spaces. Also a homotopy result is given for multivalued maps. -
Fixed Point Results for F-contractions on Space with Two Metrics
Olgun, Murat; Alyildiz, Tugce; Bicer, Ozge; Altun, Ishak (Univ Nis, Fac Sci Math, 2017)In this paper, taking into account two metrics on a space, we present a new fixed point theorem for F-contractions. Our theorem includes both Agarwal and O'Regan's and Wardowski's results as properly. Also we provide a ... -
Fixed point results for multivalued mappings of Ciric type via F-contractions on quasi metric spaces
Shatanawi, Wasfi; Altun, Ishak; Dag, Hacer (DE GRUYTER POLAND SP Z O O, 2020)In this paper, we present some fixed point results for multivalued mappings with both closed values and proximinal values on left K-complete quasi metric spaces. We also provide a nontrivial example to illustrate our results. -
Fixed Point Results For Multivalued Mappings Of Feng-Liu Type On M-Metric Spaces
Altun, Ishak; Sahin, Hakan; Turkoglu, Duran (Mathematical Research Press-Math Res, 2018)In this paper, we present some fixed point theorems for multivalued mappings of Feng-Liu type on complete M-metric spaces. Some illustrative examples are also provided to support our main results. -
Fixed point results for single valued and set valued P-contractions and application to second order boundary value problems
Altun, Ishak; Hancer, Hatice Aslan; Erduran, Ali (NORTH UNIV BAIA MARE, 2020)In this paper, by considering the concept of set-valued nonlinear P-contraction which is newly introduced, we present some new fixed point theorems for set-valued mappings on complete metric space. Then by considering a ... -
Fixed Point Results for α-ψ-Contractive Mappings Including Almost Contractions and Applications
Durmaz, Gonca; Minak, Gulhan; Altun, Ishak (Hindawi Publishing Corp, 2014)In the recent paper (B. Samet, C. Vetro, and P. Vetro, Fixed point theorems for alpha-psi-contractive type mappings, Nonlinear Analysis. Theory, Methods and Applications, 75 (2012), 2154-2165.), the authors introduced the ... -
A Fixed Point Theorem for JS-contraction Type Mappings with Applications to Polynomial Approximations
Altun, Ishak; Al Arifi, Nassir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem (Univ Nis, Fac Sci Math, 2017)A fixed point theorem is established for a new class of JS-contraction type mappings. As applications, some Kelisky-Rivlin type results are obtained for linear and nonlinear q-Bernstein-Stancu operators. -
A Fixed Point Theorem for Multivalued Mappings with delta-Distance
Acar, Ozlem; Altun, Ishak (Hindawi Publishing Corporation, 2014)We mainly study fixed point theorem for multivalued mappings with delta-distance using Wardowski's technique on complete metric space. Let (X, d) be a metric space and let B(X) be a family of all nonempty bounded subsets ... -
A Fixed Point Theorem for New Type Contractions on Weak Partial Metric Spaces
Acar, Ozlem; Altun, Ishak; Durmaz, Gonca (Springer Singapore Pte Ltd, 2015)Recently, Karapinar and Romaguera (Filomat 27: 1305-1314, 2013) have introduced a new type contraction on partial metric spaces, and they have obtained a nonunique fixed point result. Then Romaguera (Math. Sci. Appl. E-Notes ... -
A fixed point theorem for weakly compatible mappings satisfying a general contractive condition of operator type
Altun, Ishak; Turkoglu, Duran (Charles Babbage Res Ctr, 2013)In this paper, we prove a fixed point theorem for weakly compatible mappings satisfying a general contractive condition of operator type. In short, we are going to study mappings A, B,S,T : X -> X for which there exists a ... -
A Fixed point theorem on cone metric spaces with new type contractivity
Altun, Ishak; Abbas, Mujahid; Simsek, Hakan (Duke Univ Press, 2011)In the present work, a common fixed point theorem for self maps on cone metric spaces is proved. Also two examples, which shows that our main theorem is generalized version of main theorems of [A. Branciari, Int. J. Math. ... -
Fixed point theorems for a pair of mappings satisfying a generalized weakly contractive condition in ordered metric spaces
Nashine, Hemant Kumar; Altun, Ishak (Hacettepe Univ, Fac Sci, 2012)Fixed point theorems for a pair of mappings which satisfy the condition of being generalized weakly contractive in complete ordered metric spaces are derived. At the end of the paper, applications of the previous results ... -
Fixed point theorems for Ćirić-type strong almost contractions on partial metric spaces
Acar, Ozlem; Berinde, Vasile; Altun, Ishak (Springer Basel Ag, 2012)In the present paper we prove some fixed point theorems for A dagger iriA double dagger-type strong almost contractions on partial metric spaces. We also give an illustrative example. -
Fixed Point Theorems for Generalized phi-Weak Contractive Multivalued Maps on Metric and Ordered Metric Spaces
Altun, Ishak (Springer Heidelberg, 2011)In this paper, we present some fixed point theorems for multivalued maps satisfying generalized phi-weak contractions on metric and ordered metric spaces. -
Fixed Point Theorems for Generalized Weakly Contractive Condition in Ordered Metric Spaces
Nashine, Hemant Kumar; Altun, Ishak (Springer International Publishing Ag, 2011)Fixed point results with the concept of generalized weakly contractive conditions in complete ordered metric spaces are derived. These results generalize the existing fixed point results in the literature. -
Fixed Point Theorems for Monotone Mappings on Partial Metric Spaces
Altun, Ishak; Erduran, Ali (Springer International Publishing Ag, 2011)Matthews (1994) introduced a new distance p on a nonempty set X, which is called partial metric. If (X,p) is a partial metric space, then p(x,x) may not be zero for x is an element of X. In the present paper, we give some ... -
Fixed point theorems for weak contractions in the sense of Berinde on partial metric spaces
Altun, Ishak; Acar, Ozlem (Elsevier Science Bv, 2012)In this paper, we introduce the notion of (delta . L) weak contraction and (phi . L) weak contraction in the sense of Berinde in partial metric space. Then we give some fixed point results in partial metric space using ... -
Fixed Point Theorems For Weakly Contractive Mappings On S-Metric Spaces And a Homotopy Result
Rezaee, Mohammad Mandi; Shahraki, Mahryam; Sedghi, Shaban; Altun, Ishak (Tsing Hua Univ, Dept Mathematics, 2017)The present paper contains some fixed point results for weakly contractive single valued mappings on S-metric spaces and a homotopy result, which is offered as an application of the obtained new results.