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## Altun, Ishak

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 Author ID: altun.ishak Published as: Altun, I.; Altun, Ishak; Altun, İ.; Altun, İshak External Links: ORCID
 Documents Indexed: 142 Publications since 2005
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#### Co-Authors

 5 single-authored 25 Mınak, Gülhan 23 Turkoglu, Duran 15 Sedghi, Shaban 12 Acar, Özlem 11 Durmaz, Gonca 11 Olgun, Murat 7 Shobe, Nabi 6 Shobkolaei, Nabi 6 Şimşek, Hakan 5 Abbas, Mujahid 5 Hançer, Hatice Aslan 5 Romaguera Bonilla, Salvador 5 Şahin, Hakan 4 Dağ, Hacer 4 Lashin, Aref 4 Nashine, Hemant Kumar 4 Samet, Bessem 3 Çevik, Cüneyt 3 Erduran, Ali 3 Jleli, Mohamed 3 Sadarangani, Kishin B. 2 Al Arifi, Nasir 2 Al Arifi, Nassir 2 Aslantaş, Mustafa 2 Fisher, Brian 2 Imdad, Mohammad 2 Koca, Kerim 1 Alaca, Cihangir 1 Alfaqih, Waleed Mohd. 1 Alyildiz, Tuğçe 1 Asim, Mohammad 1 Berinde, Vasile 1 Biçer, Özge 1 Chauhan, Sunny 1 Chauhan, Varsha 1 Cho, Yeol Je 1 Damjanović, Boško 1 Đorić, Dragan 1 Došenović, Tatjana 1 Firouzian, Siamak 1 Gopal, Dhananjay 1 Helvacı, Asuman 1 Jleli, Mohammed 1 Miheţ, Dorel 1 Musaev, Binali I. 1 Özeken, Çetin Cemal 1 Rakočević, Vladimir 1 Rezaee, Mohammad Mahdi 1 Rhoades, Billy E. 1 Roshan, Jamal Rezaei 1 Salahshour, Mohammad Ali 1 Sen, Ravindra 1 Shahraki, Mahryam 1 Shatanawi, Wasfi A. 1 Shukla, Satish 1 Singh, Deepak Kumar 1 Sola, Ferhan 1 Soursouri, Sima 1 Vujaković, Jelena 1 Yalçın, Menşur Tuğba
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#### Serials

 7 Filomat 6 Journal of Fixed Point Theory and Applications 5 Fixed Point Theory and Applications 4 Nonlinear Analysis. Modelling and Control 4 Carpathian Journal of Mathematics 4 Journal of Nonlinear Science and Applications 3 Topology and its Applications 3 Communications of the Korean Mathematical Society 3 Hacettepe Journal of Mathematics and Statistics 3 Miskolc Mathematical Notes 2 Fasciculi Mathematici 2 Kyungpook Mathematical Journal 2 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 2 The Journal of Fuzzy Mathematics 2 Mathematical Communications 2 Vietnam Journal of Mathematics 2 Abstract and Applied Analysis 2 Taiwanese Journal of Mathematics 2 Journal of Inequalities and Applications 2 Italian Journal of Pure and Applied Mathematics 2 Journal of Nonlinear and Convex Analysis 2 Nonlinear Functional Analysis and Applications 2 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 2 Acta Universitatis Apulensis. Mathematics - Informatics 2 Journal of Intelligent and Fuzzy Systems 2 Fixed Point Theory 2 Applicable Analysis and Discrete Mathematics 2 Journal of Advanced Mathematical Studies 2 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 1 Computers & Mathematics with Applications 1 Applied Mathematics and Computation 1 Ars Combinatoria 1 Demonstratio Mathematica 1 Indian Journal of Mathematics 1 International Journal of Mathematics and Mathematical Sciences 1 Matematički Vesnik 1 Mathematica Slovaca 1 Publicationes Mathematicae 1 Rendiconti del Circolo Matemàtico di Palermo. Serie II 1 Rendiconti del Seminario Matematico della Università di Padova 1 Tamkang Journal of Mathematics 1 Southeast Asian Bulletin of Mathematics 1 Bulletin of the Korean Mathematical Society 1 Acta Mathematica Hungarica 1 Bulletin of the Iranian Mathematical Society 1 Applied Mathematics Letters 1 Topological Methods in Nonlinear Analysis 1 Bulletin of the Belgian Mathematical Society - Simon Stevin 1 Turkish Journal of Mathematics 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Analele Ştiinţifice ale Universităţii “Ovidius” Constanţa. Seria: Matematică 1 Novi Sad Journal of Mathematics 1 Journal of Computational Analysis and Applications 1 Communications in Nonlinear Science and Numerical Simulation 1 Dynamics of Continuous, Discrete & Impulsive Systems. Series A. Mathematical Analysis 1 Applied Mathematics E-Notes 1 Thai Journal of Mathematics 1 Journal of Function Spaces and Applications 1 Complex Variables and Elliptic Equations 1 Kochi Journal of Mathematics 1 Banach Journal of Mathematical Analysis 1 Creative Mathematics and Informatics 1 Bulletin of Mathematical Analysis and Applications 1 Applied General Topology 1 International Journal of Nonlinear Analysis and Applications 1 Arabian Journal for Science and Engineering 1 Communications in Mathematics 1 Arabian Journal of Mathematics 1 ISRN Computational Mathematics 1 Journal of Nonlinear Analysis and Optimization: Theory & Applications 1 Mathematical Sciences 1 Carpathian Mathematical Publications 1 Kuwait Journal of Science 1 Journal of Function Spaces 1 Sahand Communications in Mathematical Analysis 1 Open Mathematics 1 Korean Journal of Mathematics
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#### Fields

 121 General topology (54-XX) 91 Operator theory (47-XX) 3 Real functions (26-XX) 3 Ordinary differential equations (34-XX) 3 Integral equations (45-XX) 2 Functions of a complex variable (30-XX) 2 Numerical analysis (65-XX) 1 Measure and integration (28-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Partial differential equations (35-XX) 1 Functional analysis (46-XX) 1 Calculus of variations and optimal control; optimization (49-XX)

#### Citations contained in zbMATH Open

103 Publications have been cited 1,206 times in 731 Documents Cited by Year
Generalized contractions on partial metric spaces. Zbl 1207.54052
Altun, Ishak; Sola, Ferhan; Simsek, Hakan
2010
Some fixed point theorems on ordered metric spaces and application. Zbl 1197.54053
Altun, Ishak; Simsek, Hakan
2010
Fixed point theorems for monotone mappings on partial metric spaces. Zbl 1207.54051
Altun, Ishak; Erduran, Ali
2011
Fixed point and common fixed point theorems on ordered cone metric spaces. Zbl 1197.54052
Altun, Ishak; Damjanović, Boško; Djorić, Dragan
2010
Some fixed point theorems on ordered cone metric spaces. Zbl 1184.54038
Altun, Ishak; Durmaz, Gonca
2009
Coupled fixed point theorems for contractions in fuzzy metric spaces. Zbl 1180.54060
Sedghi, Shaban; Altun, Ishak; Shobe, Nabi
2010
Some fixed point theorems on dualistic partial metric spaces. Zbl 1172.54318
Altun, Ishak; Simsek, Hakan
2008
Fixed points of weakly compatible maps satisfying a general contractive condition of integral type. Zbl 1153.54022
Altun, Ishak; Türkoğlu, Duran; Rhoades, Billy E.
2007
Ćirić type generalized $$F$$-contractions on complete metric spaces and fixed point results. Zbl 06704835
Mınak, Gülhan; Helvacı, Asuman; Altun, Ishak
2014
Some coincidence point results in ordered $$b$$-metric spaces and applications in a system of integral equations. Zbl 1354.45010
Roshan, J. R.; Parvaneh, V.; Altun, I.
2014
Fixed point theorems for generalized weakly contractive condition in ordered metric spaces. Zbl 1213.54070
Nashine, Hemant Kumar; Altun, Ishak
2011
Multivalued $$F$$-contractions on complete metric spaces. Zbl 1315.54032
Altun, Ishak; Minak, Gülhan; Dağ, Hacer
2015
Fixed point theorems for weak contractions in the sense of Berinde on partial metric spaces. Zbl 1262.54015
Altun, Ishak; Acar, Özlem
2012
Some fixed point theorems for weakly compatible mappings satisfying an implicit relation. Zbl 1194.54055
Altun, Ishak; Turkoglu, Duran
2009
Corrigendum to “Generalized contractions on partial metric spaces” [Topology Appl. 157 (2010) 2778-2785]. Zbl 1226.54041
2011
A fixed point theorem for multi-valued mappings and its applications to integral inclusions. Zbl 1130.47057
Turkoglu, D.; Altun, I.
2007
Some new generalizations of Mizoguchi-Takahashi type fixed point theorem. Zbl 1293.54030
Mınak, Gülhan; Altun, Ishak
2013
Characterizations of partial metric completeness in terms of weakly contractive mappings having fixed point. Zbl 1289.54112
2012
Ordered cone metric spaces and fixed point results. Zbl 1201.65084
2010
A new approach to Mizoguchi-Takahashi type fixed point theorems. Zbl 1352.54034
Olgun, Murat; Minak, Gülhan; Altun, Ishak
2016
Some generalizations of Caristi type fixed point theorem on partial metric spaces. Zbl 1289.54110
Acar, Özlem; Altun, Ishak
2012
Some fixed point theorems for weakly compatible multivalued mappings satisfying an implicit relation. Zbl 1199.54202
Altun, Ishak; Turkoglu, Duran
2008
Fixed points of ordered $$F$$-contractions. Zbl 1347.54074
Durmaz, Gonca; Mınak, Gülhan; Altun, Ishak
2016
Some fixed point theorems for single and multivalued mappings on ordered non-Archimedean fuzzy metric spaces. Zbl 1204.54025
Altun, I.
2010
Ordered non-Archimedean fuzzy metric spaces and some fixed point results. Zbl 1191.54033
Altun, Ishak; Miheţ, Dorel
2010
Common fixed point Theorems for non compatible mappings in fuzzy metric spaces. Zbl 1175.54048
Abbas, Mujahid; Altun, Ishak; Gopal, Dhananjay
2009
On a new class of multivalued weakly Picard operators on complete metric spaces. Zbl 1357.54029
Altun, Ishak; Olgun, Murat; Mınak, Gülhan
2015
Common fixed point of mappings satisfying almost generalized $$(S,T)$$-contractive condition in partially ordered partial metric spaces. Zbl 1286.54055
Shobkolaei, N.; Sedghi, S.; Roshan, J. R.; Altun, I.
2012
Classification of completeness of quasi metric space and some fixed point results. Zbl 1378.54041
Altun, Ishak; Mınak, Gülhan; Olgun, Murat
2017
On a broad category of multivalued weakly Picard operators. Zbl 1360.54032
Hançer, Hatice Aslan; Mınak, Gülhan; Altun, Ishak
2017
Lyapunov-type inequalities for a fractional $$p$$-Laplacian equation. Zbl 1346.34004
Al Arifi, Nassir; Altun, Ishak; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
A fixed point theorem for multivalued mappings with $$\delta$$-distance. Zbl 07022493
Acar, Özlem; Altun, Ishak
2014
Multivalued almost $$F$$-contractions on complete metric spaces. Zbl 06749699
Altun, Ishak; Durmaz, Gonca; Mınak, Gülhan; Romaguera, Salvador
2016
A new approach to fixed point theorems for multivalued contractive maps. Zbl 1349.54111
Minak, Gülhan; Olgun, Murat; Altun, Ishak
2015
A common fixed point theorem on ordered metric spaces. Zbl 1297.54093
Nashine, Hemant Kumar; Altun, Ishak
2012
A common fixed point theorem for weakly compatible mappings in symmetric spaces satisfying an implicit relation. Zbl 1171.54342
Turkoglu, Duran; Altun, Ishak
2007
A fixed point theorem for mappings satisfying a general contractive condition of operator type. Zbl 1122.54020
Altun, Ishak; Turkoglu, Duran
2007
Some fixed point results for multivalued $$F$$-contractions on quasi metric spaces. Zbl 1356.54043
Dağ, H.; Mınak, G.; Altun, I.
2017
A new approach to the Assad-Kirk fixed point theorem. Zbl 1353.54028
Altun, Ishak; Olgun, Murat; Mınak, Gülhan
2016
Some properties of $$S$$-metric spaces and fixed point results. Zbl 1295.54084
Sedghi, Shaban; Altun, Ishak; Shobe, Nabi; Salahshour, Mohammad Ali
2014
Carisi’s type mappings on complete partial metric spaces. Zbl 1282.54027
Acar, Özlem; Altun, Ishak; Romaguera, Salvador
2013
Weak partial metric spaces and some fixed point results. Zbl 1256.54068
Altun, I.; Durmaz, G.
2012
Vector metric spaces and some properties. Zbl 1201.54027
Çevik, Cüneyt; Altun, Ishak
2009
A fixed point theorem for multi-maps satisfying an implicit relation on metric spaces. Zbl 1199.54245
Sedghi, S.; Altun, I.; Shobe, N.
2008
A Suzuki type fixed-point theorem. Zbl 1420.54064
Altun, Ishak; Erduran, Ali
2011
Fixed point and homotopy results for multivalued maps satisfying an implicit relation. Zbl 1205.54036
Altun, Ishak
2011
Some fixed point theorems for weakly compatible multivalued mappings satisfying some general contractive conditions of integral type. Zbl 1217.54035
Altun, I.; Turkoglu, D.
2010
A common fixed point theorem for multivalued Ćirić type mappings with new type compatibility. Zbl 1199.54201
Altun, Ishak
2009
Some fixed point results on weak partial metric spaces. Zbl 1324.54068
Durmaz, Gonca; Acar, Özlem; Altun, Ishak
2013
Fixed point theorems for Ćirić-type strong almost contractions on partial metric spaces. Zbl 1266.54082
Acar, Özlem; Berinde, Vasile; Altun, Ishak
2012
Fixed point theorems for generalized $$\varphi$$-weak contractive multivalued maps on metric and ordered metric spaces. Zbl 1297.54079
Altun, Ishak
2011
Common coupled fixed-point theorems in generalized fuzzy metric spaces. Zbl 1235.54050
Rao, K. P. R.; Altun, I.; Bindu, S. Hima
2011
Common fixed point theorem for maps satisfying a general contractive condition of integral type. Zbl 1212.54111
Altun, Ishak
2010
Some fixed point theorems on ordered uniform space. Zbl 1265.54151
2009
A fixed fuzzy point for fuzzy mappings in complete metric spaces. Zbl 1157.54310
Sedghi, Shaban; Shobe, Nabi; Altun, Ishak
2008
A fixed point theorem for multi-maps satisfying an implicit relation on metrically convex metric spaces. Zbl 1105.54303
Altun, I.; Hancer, H. A.; Turkoglu, D.
2006
Feng-Liu type fixed point results for multivalued mappings on JS-metric spaces. Zbl 1347.54066
Altun, Ishak; Al Arifi, Nasir; Jleli, Mohammed; Lashin, Aref; Samet, Bessem
2016
On fixed point theorems for multivalued mappings of Feng-Liu type. Zbl 1332.54205
Altun, Ishak; Minak, Gülhan
2015
Fixed point theorems for weakly contractive mappings on $$G$$-metric spaces and a homotopy result. Zbl 1281.54023
Erduran, A.; Altun, I.
2012
Some fixed point theorems on fuzzy metric spaces with implicit relations. Zbl 1168.54326
Altun, Ishak; Turkoglu, Duran
2008
Fixed point and homotopy result for mappings satisfying an implicit relation. Zbl 1152.54350
Altun, I.; Turkoglu, D.
2007
Two fixed point results for multivalued $$F$$-contractions on $$M$$-metric spaces. Zbl 07092215
Sahin, Hakan; Altun, Ishak; Turkoglu, Duran
2019
Fixed points of multivalued nonlinear $$F$$-contractions on complete metric spaces. Zbl 1420.54065
Altun, Ishak; Mınak, Gülhan; Olgun, Murat
2016
Overall approach to Mizoguchi-Takahashi type fixed point results. Zbl 1424.54092
Minak, Gülhan; Altun, Ishak
2016
On a general class of weakly Picard operators. Zbl 1340.54054
Altun, Ishak; Hançer, Hatice Aslan; Minak, Gülhan
2015
Recent developments about multivalued weakly Picard operators. Zbl 1326.54046
Minak, Gülhan; Altun, Ishak; Romaguera, Salvador
2015
New fixed point results for maps satisfying implicit relations on ordered metric spaces and application. Zbl 1334.54069
Nashine, Hemant Kumar; Altun, Ishak
2014
Multivalued pseudo-Picard operators and fixed point results. Zbl 1440.54037
Mınak, Gülhan; Acar, Özlem; Altun, Ishak
2013
Fixed point theorems and asymptotically regular mappings in partial metric spaces. Zbl 1268.54034
Shukla, Satish; Altun, Ishak; Sen, Ravindra
2013
Some fixed point theorems for mappings satisfying contractive condition of integral type on $$d$$-complete topological spaces. Zbl 1184.54039
Altun, Ishak; Turkoglu, Duran
2009
Fixed point results for $$\alpha$$-admissible multivalued $$F$$-contractions. Zbl 1389.54086
Durmaz, G.; Altun, I.
2016
A new approach for the approximations of solutions to a common fixed point problem in metric fixed point theory. Zbl 06653048
Altun, Ishak; Al Arifi, Nassir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
A new concept of $$(\alpha ,F_d)$$-contraction on quasi metric space. Zbl 1341.54025
Altun, Ishak; Al Arifi, Nasir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
Common fixed points of Ćirić-type contractions on partial metric spaces. Zbl 1299.54074
Abbas, Mujahid; Altun, Ishak; Romaguera, Salvador
2013
Generalized Geraghty type mappings on partial metric spaces and fixed point results. Zbl 1276.54030
2013
Fixed point theorems for a pair of mappings satisfying a generalized weakly contractive condition in ordered metric spaces. Zbl 1278.54041
Nashine, Hemant Kumar; Altun, Ishak
2012
Some common fixed point theorems in vector metric spaces. Zbl 1289.54111
Altun, Ishak; Çevik, Cüneyt
2011
Common fixed point theorems for weakly increasing mappings on ordered uniform spaces. Zbl 1240.54116
Altun, Ishak
2011
On compatible mappings of type $$(I)$$ and $$(II)$$ in intuitionistic fuzzy metric spaces. Zbl 1168.54324
Alaca, Cihangir; Altun, Ishak; Turkoglu, Duran
2008
Fixed point results for Perov type $$F$$-contractions and an application. Zbl 1439.54023
Altun, Ishak; Olgun, Murat
2020
On nonlinear set-valued $$\theta$$-contractions. Zbl 1432.54056
Durmaz, Gonca; Altun, Ishak
2020
Common fixed point of a power graphic $$(F,\psi)$$-contraction pair on partial $$b$$-metric spaces with application. Zbl 1420.54092
Singh, Deepak; Chauhan, Varsha; Altun, Ishak
2017
Fixed point theorems for weakly contractive mappings on $$S$$-metric spaces and a homotopy result. Zbl 1414.54034
Rezaee, Mohammad Mahdi; Shahraki, Mahryam; Sedghi, Shaban; Altun, Ishak
2017
Some fixed point theorems for contractive mapping in ordered vector metric spaces. Zbl 1412.47103
Çevik, Cüneyt; Altun, Ishak; Şahin, Hakan; Özeken, Çetin Cemal
2017
Fixed points of $$F$$-contractive type fuzzy mappings. Zbl 1422.54055
Mınak, Gülhan; Altun, Ishak; Olgun, Murat
2017
Nonlinear proximinal multivalued contractions on quasi-metric spaces. Zbl 1378.54040
Altun, Ishak; Dağ, Hacer
2017
A new sequence realizing Lucas numbers, and the Lucas bound. Zbl 1371.11042
Özkan, E.; Geçer, A.; Altun, İ.
2017
On the effect of $$\alpha$$-admissibility and $$\alpha$$-contractivity to the existence of fixed points of multivalued mappings. Zbl 1420.54079
Mınak, Gülhan; Altun, Ishak
2016
Fixed-point theorems for integral-type contractions on partial metric spaces. Zbl 07030388
Sabetghadam, F.; Masiha, H. P.; Altun, I.
2016
An extension of Assad-Kirk’s fixed point theorem for multivalued nonself mappings. Zbl 1399.54079
Altun, Ishak; Minak, Gülhan
2016
Partial fuzzy metric space and some fixed point results. Zbl 1337.54047
Sedghi, Shaban; Shobkolaei, Nabi; Altun, Ishak
2015
Multivalued almost contractions in metric space endowed with a graph. Zbl 1349.54079
Altun, Ishak; Acar, Özlem
2015
A related fixed point theorem for maps in two S-complete Hausdorff uniform spaces. Zbl 1306.54056
Shobkolaei, Nabi; Sedghi, Shaban; Roshan, Jamal R.; Altun, Ishak
2014
Mizoguchi-Takahashi type fixed point theorem on partial metric spaces. Zbl 1369.54028
Altun, Ishak; Minak, Gülhan
2014
Multivalued weakly Picard operators on partial metric spaces. Zbl 1294.54031
Mınak, Gülhan; Altun, Ishak
2014
Common fixed point theorems of integral type in Menger PM spaces. Zbl 1413.54098
Altun, I.; Tanveer, M.; Imdad, M.
2012
Some properties of $$T$$-metric spaces and a common fixed point theorem. Zbl 1256.54080
Sedghi, S.; Altun, I.; Shobe, N.
2012
A fixed point theorem on cone metric spaces with new type contractivity. Zbl 1223.54053
Altun, Ishak; Abbas, Mujahid; Simsek, Hakan
2011
Fixed points of sequences of maps on fuzzy metric spaces. Zbl 1172.54319
Altun, Ishak; Turkoglu, Duran
2008
Fixed point theorem for multivalued mappings satisfying an implicit relation. Zbl 1172.54339
Turkoglu, Duran; Altun, Ishak
2008
Fixed point results for Perov type $$F$$-contractions and an application. Zbl 1439.54023
Altun, Ishak; Olgun, Murat
2020
On nonlinear set-valued $$\theta$$-contractions. Zbl 1432.54056
Durmaz, Gonca; Altun, Ishak
2020
Two fixed point results for multivalued $$F$$-contractions on $$M$$-metric spaces. Zbl 07092215
Sahin, Hakan; Altun, Ishak; Turkoglu, Duran
2019
Classification of completeness of quasi metric space and some fixed point results. Zbl 1378.54041
Altun, Ishak; Mınak, Gülhan; Olgun, Murat
2017
On a broad category of multivalued weakly Picard operators. Zbl 1360.54032
Hançer, Hatice Aslan; Mınak, Gülhan; Altun, Ishak
2017
Some fixed point results for multivalued $$F$$-contractions on quasi metric spaces. Zbl 1356.54043
Dağ, H.; Mınak, G.; Altun, I.
2017
Common fixed point of a power graphic $$(F,\psi)$$-contraction pair on partial $$b$$-metric spaces with application. Zbl 1420.54092
Singh, Deepak; Chauhan, Varsha; Altun, Ishak
2017
Fixed point theorems for weakly contractive mappings on $$S$$-metric spaces and a homotopy result. Zbl 1414.54034
Rezaee, Mohammad Mahdi; Shahraki, Mahryam; Sedghi, Shaban; Altun, Ishak
2017
Some fixed point theorems for contractive mapping in ordered vector metric spaces. Zbl 1412.47103
Çevik, Cüneyt; Altun, Ishak; Şahin, Hakan; Özeken, Çetin Cemal
2017
Fixed points of $$F$$-contractive type fuzzy mappings. Zbl 1422.54055
Mınak, Gülhan; Altun, Ishak; Olgun, Murat
2017
Nonlinear proximinal multivalued contractions on quasi-metric spaces. Zbl 1378.54040
Altun, Ishak; Dağ, Hacer
2017
A new sequence realizing Lucas numbers, and the Lucas bound. Zbl 1371.11042
Özkan, E.; Geçer, A.; Altun, İ.
2017
A new approach to Mizoguchi-Takahashi type fixed point theorems. Zbl 1352.54034
Olgun, Murat; Minak, Gülhan; Altun, Ishak
2016
Fixed points of ordered $$F$$-contractions. Zbl 1347.54074
Durmaz, Gonca; Mınak, Gülhan; Altun, Ishak
2016
Lyapunov-type inequalities for a fractional $$p$$-Laplacian equation. Zbl 1346.34004
Al Arifi, Nassir; Altun, Ishak; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
Multivalued almost $$F$$-contractions on complete metric spaces. Zbl 06749699
Altun, Ishak; Durmaz, Gonca; Mınak, Gülhan; Romaguera, Salvador
2016
A new approach to the Assad-Kirk fixed point theorem. Zbl 1353.54028
Altun, Ishak; Olgun, Murat; Mınak, Gülhan
2016
Feng-Liu type fixed point results for multivalued mappings on JS-metric spaces. Zbl 1347.54066
Altun, Ishak; Al Arifi, Nasir; Jleli, Mohammed; Lashin, Aref; Samet, Bessem
2016
Fixed points of multivalued nonlinear $$F$$-contractions on complete metric spaces. Zbl 1420.54065
Altun, Ishak; Mınak, Gülhan; Olgun, Murat
2016
Overall approach to Mizoguchi-Takahashi type fixed point results. Zbl 1424.54092
Minak, Gülhan; Altun, Ishak
2016
Fixed point results for $$\alpha$$-admissible multivalued $$F$$-contractions. Zbl 1389.54086
Durmaz, G.; Altun, I.
2016
A new approach for the approximations of solutions to a common fixed point problem in metric fixed point theory. Zbl 06653048
Altun, Ishak; Al Arifi, Nassir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
A new concept of $$(\alpha ,F_d)$$-contraction on quasi metric space. Zbl 1341.54025
Altun, Ishak; Al Arifi, Nasir; Jleli, Mohamed; Lashin, Aref; Samet, Bessem
2016
On the effect of $$\alpha$$-admissibility and $$\alpha$$-contractivity to the existence of fixed points of multivalued mappings. Zbl 1420.54079
Mınak, Gülhan; Altun, Ishak
2016
Fixed-point theorems for integral-type contractions on partial metric spaces. Zbl 07030388
Sabetghadam, F.; Masiha, H. P.; Altun, I.
2016
An extension of Assad-Kirk’s fixed point theorem for multivalued nonself mappings. Zbl 1399.54079
Altun, Ishak; Minak, Gülhan
2016
Multivalued $$F$$-contractions on complete metric spaces. Zbl 1315.54032
Altun, Ishak; Minak, Gülhan; Dağ, Hacer
2015
On a new class of multivalued weakly Picard operators on complete metric spaces. Zbl 1357.54029
Altun, Ishak; Olgun, Murat; Mınak, Gülhan
2015
A new approach to fixed point theorems for multivalued contractive maps. Zbl 1349.54111
Minak, Gülhan; Olgun, Murat; Altun, Ishak
2015
On fixed point theorems for multivalued mappings of Feng-Liu type. Zbl 1332.54205
Altun, Ishak; Minak, Gülhan
2015
On a general class of weakly Picard operators. Zbl 1340.54054
Altun, Ishak; Hançer, Hatice Aslan; Minak, Gülhan
2015
Recent developments about multivalued weakly Picard operators. Zbl 1326.54046
Minak, Gülhan; Altun, Ishak; Romaguera, Salvador
2015
Partial fuzzy metric space and some fixed point results. Zbl 1337.54047
Sedghi, Shaban; Shobkolaei, Nabi; Altun, Ishak
2015
Multivalued almost contractions in metric space endowed with a graph. Zbl 1349.54079
Altun, Ishak; Acar, Özlem
2015
Ćirić type generalized $$F$$-contractions on complete metric spaces and fixed point results. Zbl 06704835
Mınak, Gülhan; Helvacı, Asuman; Altun, Ishak
2014
Some coincidence point results in ordered $$b$$-metric spaces and applications in a system of integral equations. Zbl 1354.45010
Roshan, J. R.; Parvaneh, V.; Altun, I.
2014
A fixed point theorem for multivalued mappings with $$\delta$$-distance. Zbl 07022493
Acar, Özlem; Altun, Ishak
2014
Some properties of $$S$$-metric spaces and fixed point results. Zbl 1295.54084
Sedghi, Shaban; Altun, Ishak; Shobe, Nabi; Salahshour, Mohammad Ali
2014
New fixed point results for maps satisfying implicit relations on ordered metric spaces and application. Zbl 1334.54069
Nashine, Hemant Kumar; Altun, Ishak
2014
A related fixed point theorem for maps in two S-complete Hausdorff uniform spaces. Zbl 1306.54056
Shobkolaei, Nabi; Sedghi, Shaban; Roshan, Jamal R.; Altun, Ishak
2014
Mizoguchi-Takahashi type fixed point theorem on partial metric spaces. Zbl 1369.54028
Altun, Ishak; Minak, Gülhan
2014
Multivalued weakly Picard operators on partial metric spaces. Zbl 1294.54031
Mınak, Gülhan; Altun, Ishak
2014
Some new generalizations of Mizoguchi-Takahashi type fixed point theorem. Zbl 1293.54030
Mınak, Gülhan; Altun, Ishak
2013
Carisi’s type mappings on complete partial metric spaces. Zbl 1282.54027
Acar, Özlem; Altun, Ishak; Romaguera, Salvador
2013
Some fixed point results on weak partial metric spaces. Zbl 1324.54068
Durmaz, Gonca; Acar, Özlem; Altun, Ishak
2013
Multivalued pseudo-Picard operators and fixed point results. Zbl 1440.54037
Mınak, Gülhan; Acar, Özlem; Altun, Ishak
2013
Fixed point theorems and asymptotically regular mappings in partial metric spaces. Zbl 1268.54034
Shukla, Satish; Altun, Ishak; Sen, Ravindra
2013
Common fixed points of Ćirić-type contractions on partial metric spaces. Zbl 1299.54074
Abbas, Mujahid; Altun, Ishak; Romaguera, Salvador
2013
Generalized Geraghty type mappings on partial metric spaces and fixed point results. Zbl 1276.54030
2013
Fixed point theorems for weak contractions in the sense of Berinde on partial metric spaces. Zbl 1262.54015
Altun, Ishak; Acar, Özlem
2012
Characterizations of partial metric completeness in terms of weakly contractive mappings having fixed point. Zbl 1289.54112
2012
Some generalizations of Caristi type fixed point theorem on partial metric spaces. Zbl 1289.54110
Acar, Özlem; Altun, Ishak
2012
Common fixed point of mappings satisfying almost generalized $$(S,T)$$-contractive condition in partially ordered partial metric spaces. Zbl 1286.54055
Shobkolaei, N.; Sedghi, S.; Roshan, J. R.; Altun, I.
2012
A common fixed point theorem on ordered metric spaces. Zbl 1297.54093
Nashine, Hemant Kumar; Altun, Ishak
2012
Weak partial metric spaces and some fixed point results. Zbl 1256.54068
Altun, I.; Durmaz, G.
2012
Fixed point theorems for Ćirić-type strong almost contractions on partial metric spaces. Zbl 1266.54082
Acar, Özlem; Berinde, Vasile; Altun, Ishak
2012
Fixed point theorems for weakly contractive mappings on $$G$$-metric spaces and a homotopy result. Zbl 1281.54023
Erduran, A.; Altun, I.
2012
Fixed point theorems for a pair of mappings satisfying a generalized weakly contractive condition in ordered metric spaces. Zbl 1278.54041
Nashine, Hemant Kumar; Altun, Ishak
2012
Common fixed point theorems of integral type in Menger PM spaces. Zbl 1413.54098
Altun, I.; Tanveer, M.; Imdad, M.
2012
Some properties of $$T$$-metric spaces and a common fixed point theorem. Zbl 1256.54080
Sedghi, S.; Altun, I.; Shobe, N.
2012
Fixed point theorems for monotone mappings on partial metric spaces. Zbl 1207.54051
Altun, Ishak; Erduran, Ali
2011
Fixed point theorems for generalized weakly contractive condition in ordered metric spaces. Zbl 1213.54070
Nashine, Hemant Kumar; Altun, Ishak
2011
Corrigendum to “Generalized contractions on partial metric spaces” [Topology Appl. 157 (2010) 2778-2785]. Zbl 1226.54041
2011
A Suzuki type fixed-point theorem. Zbl 1420.54064
Altun, Ishak; Erduran, Ali
2011
Fixed point and homotopy results for multivalued maps satisfying an implicit relation. Zbl 1205.54036
Altun, Ishak
2011
Fixed point theorems for generalized $$\varphi$$-weak contractive multivalued maps on metric and ordered metric spaces. Zbl 1297.54079
Altun, Ishak
2011
Common coupled fixed-point theorems in generalized fuzzy metric spaces. Zbl 1235.54050
Rao, K. P. R.; Altun, I.; Bindu, S. Hima
2011
Some common fixed point theorems in vector metric spaces. Zbl 1289.54111
Altun, Ishak; Çevik, Cüneyt
2011
Common fixed point theorems for weakly increasing mappings on ordered uniform spaces. Zbl 1240.54116
Altun, Ishak
2011
A fixed point theorem on cone metric spaces with new type contractivity. Zbl 1223.54053
Altun, Ishak; Abbas, Mujahid; Simsek, Hakan
2011
Generalized contractions on partial metric spaces. Zbl 1207.54052
Altun, Ishak; Sola, Ferhan; Simsek, Hakan
2010
Some fixed point theorems on ordered metric spaces and application. Zbl 1197.54053
Altun, Ishak; Simsek, Hakan
2010
Fixed point and common fixed point theorems on ordered cone metric spaces. Zbl 1197.54052
Altun, Ishak; Damjanović, Boško; Djorić, Dragan
2010
Coupled fixed point theorems for contractions in fuzzy metric spaces. Zbl 1180.54060
Sedghi, Shaban; Altun, Ishak; Shobe, Nabi
2010
Ordered cone metric spaces and fixed point results. Zbl 1201.65084
2010
Some fixed point theorems for single and multivalued mappings on ordered non-Archimedean fuzzy metric spaces. Zbl 1204.54025
Altun, I.
2010
Ordered non-Archimedean fuzzy metric spaces and some fixed point results. Zbl 1191.54033
Altun, Ishak; Miheţ, Dorel
2010
Some fixed point theorems for weakly compatible multivalued mappings satisfying some general contractive conditions of integral type. Zbl 1217.54035
Altun, I.; Turkoglu, D.
2010
Common fixed point theorem for maps satisfying a general contractive condition of integral type. Zbl 1212.54111
Altun, Ishak
2010
Some fixed point theorems on ordered cone metric spaces. Zbl 1184.54038
Altun, Ishak; Durmaz, Gonca
2009
Some fixed point theorems for weakly compatible mappings satisfying an implicit relation. Zbl 1194.54055
Altun, Ishak; Turkoglu, Duran
2009
Common fixed point Theorems for non compatible mappings in fuzzy metric spaces. Zbl 1175.54048
Abbas, Mujahid; Altun, Ishak; Gopal, Dhananjay
2009
Vector metric spaces and some properties. Zbl 1201.54027
Çevik, Cüneyt; Altun, Ishak
2009
A common fixed point theorem for multivalued Ćirić type mappings with new type compatibility. Zbl 1199.54201
Altun, Ishak
2009
Some fixed point theorems on ordered uniform space. Zbl 1265.54151
2009
Some fixed point theorems for mappings satisfying contractive condition of integral type on $$d$$-complete topological spaces. Zbl 1184.54039
Altun, Ishak; Turkoglu, Duran
2009
Some fixed point theorems on dualistic partial metric spaces. Zbl 1172.54318
Altun, Ishak; Simsek, Hakan
2008
Some fixed point theorems for weakly compatible multivalued mappings satisfying an implicit relation. Zbl 1199.54202
Altun, Ishak; Turkoglu, Duran
2008
A fixed point theorem for multi-maps satisfying an implicit relation on metric spaces. Zbl 1199.54245
Sedghi, S.; Altun, I.; Shobe, N.
2008
A fixed fuzzy point for fuzzy mappings in complete metric spaces. Zbl 1157.54310
Sedghi, Shaban; Shobe, Nabi; Altun, Ishak
2008
Some fixed point theorems on fuzzy metric spaces with implicit relations. Zbl 1168.54326
Altun, Ishak; Turkoglu, Duran
2008
On compatible mappings of type $$(I)$$ and $$(II)$$ in intuitionistic fuzzy metric spaces. Zbl 1168.54324
Alaca, Cihangir; Altun, Ishak; Turkoglu, Duran
2008
Fixed points of sequences of maps on fuzzy metric spaces. Zbl 1172.54319
Altun, Ishak; Turkoglu, Duran
2008
Fixed point theorem for multivalued mappings satisfying an implicit relation. Zbl 1172.54339
Turkoglu, Duran; Altun, Ishak
2008
Fixed points of weakly compatible maps satisfying a general contractive condition of integral type. Zbl 1153.54022
Altun, Ishak; Türkoğlu, Duran; Rhoades, Billy E.
2007
A fixed point theorem for multi-valued mappings and its applications to integral inclusions. Zbl 1130.47057
Turkoglu, D.; Altun, I.
2007
A common fixed point theorem for weakly compatible mappings in symmetric spaces satisfying an implicit relation. Zbl 1171.54342
Turkoglu, Duran; Altun, Ishak
2007
A fixed point theorem for mappings satisfying a general contractive condition of operator type. Zbl 1122.54020
Altun, Ishak; Turkoglu, Duran
2007
Fixed point and homotopy result for mappings satisfying an implicit relation. Zbl 1152.54350
Altun, I.; Turkoglu, D.
2007
A fixed point theorem for multi-maps satisfying an implicit relation on metrically convex metric spaces. Zbl 1105.54303
Altun, I.; Hancer, H. A.; Turkoglu, D.
2006
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