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Institutional Information: Fen Fakültesi, Matematik Bölümü, Matematiğin Temelleri Ve Matematik Lojik Anabilim Dalı
Research Areas: Mathematics, Natural Sciences




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48. Harish Garg, Mehmet Ünver, Büşra Aydoğan, Murat Olgun (2023)  An extended TOPSIS and entropy measure based on Sugeno integral in Pythagorean fuzzy set setting, Journal of Intelligent & Fuzzy Systems  (Accepted).

47.  Harish Garg , Murat Olgun , Mehmet Ünver  , Ezgi Türkarslan (2023) An extension of CODAS method for multi-criteria group decision making with complex intuitionistic fuzzy information via Dombi sine weighted arithmetic aggregation operators, Granular Computing (Accepted).

46. Mehmet Ünver, Murat Olgun (2023) Continuous function valued q-rung orthopair fuzzy sets and an extended TOPSIS, International Journal of Fuzzy Systems(Accepted).

45. Ezgi Türkarslan, Jun Ye, Mehmet Ünver and Murat Olgun (2023)  Consistency fuzzy cross entropy based VIKOR approach for multi-criteria decision making, Iranian Journal of Fuzzy Systems (Accepted).

44. Mahmut Can Bozyigit , Murat Olgun , Florentin Smarandache, Mehmet Ünver (2023) A new type of neutrosophic set in Pythagorean Fuzzy environment and Applications to multi-criteria decision making, International Journal of Neutrosophic Science, Vol. 20 , No. 2 ,: 107-134 (Doi   :

43. Ünver, Mehmet, Türkarslan, Ezgi, Ye, Jun and Olgun, Murat (2023).Linguistic Single And Interval-Valued Hybrid Intuitionistic Fuzzy Multi-Sets And Applications To Multi-Criteria Group Decision Making, J. Mult.-Valued Log. Soft Comput. (Accepted)

42. Ünver, Mehmet, Olgun, Murat and Garg, Harish, (2023). An Information Measure Based Extended Vikor Method In Intuitionistic Fuzzy Valued Neutrosophic Value Setting For Multi-Criteria Group Decision Making, Sci. Iran. (Accepted).

41.  Garg, Harish, Olgun, Murat, Türkarslan, Ezgi and Ünver, Mehmet (2022). A Choquet Integral Based Cosine Similarity Measure For Interval-Valued Intuitionistic Fuzzy Sets And An Application To Pattern Recognition. Lobachevskii J. Math., 43, 2444–2452.

40. Ye Jun, Türkarslan Ezgi, Ünver Mehmet, Olgun Murat (2022).  Algebraic And Einstein Weighted Operators Of Neutrosophic Enthalpy Values For Multi-Criteria Decision Making In Neutrosophic Multi-Valued Set Settings.  Granular Computing, 7 (3), 479-487.

39. Olgun Murat, Türkarslan Ezgi, Ye Jun, Ünver Mehmet (2022).  Single And Interval-Valued Hybrid Enthalpy Fuzzy Sets And A Topsis Approach For Multicriteria Group Decision Making.  Mathematical Problems In Engineering, 2022, Doi: 10.1155/2022/2501321

38. Ünver Mehmet, Olgun Murat, Türkarslan Ezgi (2022).  Cosine And Cotangent Similarity Measures Based On Choquet Integral For Spherical Fuzzy Sets And Applications To Pattern Recognition.  Journal Of Computational And Cognitive Engineering, 1(1), Doi: 10.47852/Bonviewjcce2022010105

37. Ünver Mehmet, Türkarslan Ezgi, Çelik Nuri, Olgun Murat, Ye Jun (2022).  Intuitionistic Fuzzy-Valued Neutrosophic Multi-Sets And Numerical Applications To Classification.  Complex&Intelligent Systems, 8(2), 19, Doi: 10.1007/S40747-021-00621-5

36. Olgun Murat, Alyıldız Tuğçe, Biçer Ödemiş Özge,Altun İshak (2021)  Maia Type Fixed Point Results For Multivalued F-Contractions.  Miskolc Mathematical Notes, 22 (2), 819-829.

35. Türkarslan Ezgi, Ünver Mehmet, Olgun Murat (2021).  Q-Rung Orthopair Fuzzy Topological Spaces.  Lobachevskii Journal Of Mathematics, 42, 470-478., Doi: 10.1134/S1995080221020219

34. Olgun Murat, Ünver Mehmet, Yardimci Şeyhmus (2021).  Pythagorean Fuzzy Points and Applications In Pattern Recognition And Pythagorean Fuzzy Topologies.  Soft Computing, 25 (7), 5225-5232 Doi: 10.1007/S00500-020-05522-2

33. Olgun Murat, Türkarslan Ezgi, Ünver Mehmet, Ye Jun (2021).  A Cosine Similarity Measure Based on The Choquet Integral For Intuitionistic Fuzzy Sets And Its Applications To Pattern Recognition.  Informatica, 32 (4), 849-864, Doi: 10.15388/21-Infor460

32. Olgun Murat, Türkarslan Ezgi, Ünver Mehmet, Ye Jun (2021).  2-Additive Choquet Similarity Measures for Multi-Period Medical Diagnosis In Single-Valued Neutrosophic Set Setting.  Neutrosophic Sets And Systems, 45 (1), 2.

31. Türkarslan Ezgi, Ye Jun, Ünver Mehmet, Olgun Murat (2021).  Consistency Fuzzy Sets And A Cosine Similarity Measure In Fuzzy Multiset Setting And Application To Medical Diagnosis.  Mathematical Problems In Engineering, 2021, Doi: 10.1155/2021/9975983

30. Altun İshak, Qasim Muhammad, Olgun Murat (2021).  A New Result Of Prešić Type Theorems With Applications To Second Order Boundary Value Problems.  Filomat, 35, 2257-2266., Doi: 10.2298/Fil2107257a

29. Biçer Ödemiş Özge, Olgun Murat,Alyıldız Tuğçe,Altun İshak (2020).  Some Related Fixed Point Theorems For Multivalued Mappings On Two Metric Spaces.  Carpathian Mathematical Publications, 12(2), 392-400., Doi: 10.15330/Cmp.12.2.392-400

28. Altun İshak, Olgun Murat (2020).  An Existence And Uniqueness Theorem For A Fractional Boundary Value Problem Via New Fixed Point Results On Quasi Metric Spaces.  Communications In Nonlinear Science And Numerical Simulation, 91(105462), 1-9., Doi: 10.1016/J.Cnsns.2020.105462

27.  Altun İshak, Olgun Murat (2020).  Fixed Point Results For Perov Type F-Contractions And An Application.  Journal Of Fixed Point Theory And Applications, 22(46), 1-11., Doi: 10.1007/S11784-020-00779-4.

26Ünver Mehmet, Özçelik Gökhan, Olgun Murat (2020).  A Pre-Subadditive Fuzzy Measure Model And Its Theoretical Interpretation.  Twms (Turkic World Mathematical Society) Journal Of Applied And Engineering Mathematics, 10(1), 270-278.

25. Olgun Murat, Biçer Ödemiş Özge, Alyıldız Tuğçe, Altun İshak (2019).  A Related Fixed Point Theorem For F-Contractions On Two Metric Spaces.  Hacettepe Journal Of Mathematics And Statistics, 48(1), 150-156., Doi: 10.15672/Hjms.2017.517.

24. Olgun Murat, Ünver Mehmet, Yardimci Şeyhmus (2019).  Pythagorean Fuzzy Topological Spaces.  Complex &Amp; Intelligent Systems, 5(2), 177-183., Doi: 10.1007/S40747-019-0095-2

23. Aslan Hançer Hatice, Olgun Murat,Altun İshak (2019).  Some New Types Multivalued F-Contractions On Quasi Metric Spaces And Their Fixed Points.  Carpathian Journal Of Mathematics, 35(1), 41-50.

22. Ünver Mehmet,Özçelik Gökhan,Olgun Murat (2018).  A Fuzzy Measure Theoretical Approach For Multi Criteria Decision Making Problems Containing Sub-Criteria.  Journal Of Intelligent  Fuzzy Systems, 35(6), 6461-6468.

21. Altun İshak,Durmaz Gonca,Olgun Murat (2018).  P-Contractive Mappings On Metric Spaces.  Journal Of Nonlinear Functional Analysis, 2018(1), 1-7., Doi: 10.23952/Jnfa.2018.43.

20. Olgun Murat,Alyildiz Tuğçe,Biçer Özge,Altun İshak (2017).  Fixed Point Results For F-Contractions On Space With Two Metrics.  Filomat, 31(17), 5421-5426.

19. Minak Gülhan,Altun İshak,Olgun Murat (2017).  Fixed Points Of F-Contractive Type Fuzzy Mappings.  Journal Of Intelligent   Fuzzy Systems, 33(3), 1435-1439., Doi: 10.3233/Jifs-162365.

18. Altun İshak,Minak Gülhan,Olgun Murat (2017).  Classification Of Completeness Of Quasi Metric Space And Some Fixed Point Results.  Nonlinear Functional Analysis And Applications, 22(2), 371-384.

17.Katar Deniz,Olgun Murat,Coşkun Cafer (2016).  Matrix Sturm Liouville Operators With Boundary Conditions Dependent On The Spectral Parameter.  The Journal Of Nonlinear Sciences And Applications, 9(2), 435-442.

16.Altun İshak,Olgun Murat,Minak Gülhan (2016).  A New Approach To The Assad Kirk Fixed Point Theorem.  Journal Of Fixed Point Theory And Applications, 18(1), 201-212., Doi: 10.1007/S11784-015-0270-Z.14.

15. Altun İshak,Minak Gülhan,Olgun Murat (2016).  Fixed Points Of Multivalued Nonlinear F Contractions On Complete Metric Spaces.  Nonlinear Analysis-Modelling And Control, 21(2), 201-210., Doi: 10.15388/Na.2016.2.4.

14. Yardimci Şeyhmus,Olgun Murat,Can Çağla (2016).  Numerical Computation And Properties Of The Two Dimensional Exponential Integrals.  Hacettepe Journal Of Mathematics And Statistics, 2(45), 483-495., Doi: 10.15672/Hjms.20164512505.

13. Olgun Murat,Biçer Özge,Alyıldız Tuğçe (2016).  A New Aspect To Picard Operators With Simulation Functions.  Turkish Journal Of Mathematics, 40, 832-837., Doi: 10.3906/Mat-1505-26.

12. Olgun Murat,Minak Gülhan,Altun İshak (2016).  A New Approach To Mizoguchi Takahashi Type Fixed Point Theorems.  Journal Of Nonlinear And Convex Analysis, 17(3), 579-587.

11. Minak Gülhan,Olgun Murat,Altun İshak (2015).  A New Approach To Fixed Point Theorems For Multivalued Contractive Maps.  Carpathian Journal Of Mathematics, 31(3), 241-248.

10 Altun İshak,Olgun Murat,Minak Gülhan (2015).  On A New Class Of Multivalued Weakly Picard Operators On Complete Metric Spaces.  Taiwanese Journal Of Mathematics, 19(3), 659-672., Doi: 10.11650/Tjm.19.2015.4752.

9. Olgun Murat (2015).  Non Selfadjoint Matrix Sturm Liouville Operators With Eigenvalue Dependent Boundary Conditions.  Hacettepe Journal Of Mathematics And Statistics, 44(3), 607-614., Doi: 10.15672/Hjms.2015449424.

8. Coskun Cafer, Katar Deniz, Olgun Murat (2014).  Principal Functions Of Non Selfadjoint Matrix Sturm Liouville Operators With Boundary Conditions Dependent On The Spectral Parameter.  Communications Faculty Of Sciences University Of Ankara Series A 1: Mathematics And Statistics , 63, 25-34.

7. Deniz Katar,Olgun Murat,Coskun Cafer (2014).  Principal Functions Of Matrix Sturm Liouvilleoperators With Boundary Conditions Dependent Onthe Spectral Parameter.  Miskolc Mathematical Notes, 15(2), 525-535.

6. Aygar Yelda, Olgun Murat (2014).  Investigation Of The Spectrum And The Jost Solutions Of Discrete Dirac System On The Whole Axis.  Journal Of Inequalities And Applications, 2014(73), 1-9., Doi: 10.1186/1029-242x-2014-73.

5. Aygar Küçükevcilioğlu Yelda,Olgun Murat,Köprübaşi Turhan (2012).  Principal Functions Of Nonselfadjoint Discrete Dirac Equations With Spectral Parameter In Boundary Conditions.  Abstract And Applied Analysis, 2012(2012), 1-15., Doi: 10.1155/2012/924628.

4. Olgun Murat , Koprubasi Turhan , Aygar Yelda (2011).  Principal Functions Of Non Selfadjoint Difference Operator With Spectralparameter In Boundary Conditions.  Abstract And Applied Analysis, 2011(2011), 1-10., Doi: 10.1155/2011/608329.

3. Cafer Coşkun,Olgun Murat (2011).  Principal Functions Of Non Selfadjoint Matrix Sturm Liouville Equations.  Journal Of Computational And Applied Mathematics, 235(16, Si), 4834-4838., Doi: 10.1016/J.Cam.2010.12.004.

2. Bayram Elgiz, Aygar Küçükevcilioğlu Yelda,Olgun Murat (2010).  Jost Solution And The Spectrum Of The Discrete Dirac Systems.  Boundary Value Problems, 2010(2010), 1-11., Doi: 10.1155/2010/306571.

1. Olgun Murat , Coskun Cafer (2010).  Non Selfadjoint Matrix Sturm Liouville Operators With Spectral Singularities.  Applied Mathematics And Computation, 216(8), 2271-2275., Doi: 10.1016/J.Amc.2010.03.062


1. Yelda Aygar, Murat Olgun; Principal Vectors of Matrix-valued Difference Operators; Computational Analysis, Amat (2015) Springer; (Editors: Anastassiou, George A., Duman, Oktay).

2. Ezgi Türkarslan, Murat Olgun, Mehmet Ünver, Şeyhmus Yardimci Chapter 11. 2- (Additive Choquet Cosine Similarity Measures for Simplified Neutrosophic Sets and Applications to Medical Diagnosis Decision-Making with Neutrosophic Set: Theory and Applications in Knowledge Management-Nova Science Publishers Editor: Harish Garg (2021).

3. Türkarslan, Ezgi, Olgun, Murat., Ünver, Mehmet, & Yardimci, S.. Some Trigonometric Similarity Measures Based on the Choquet Integral for Pythagorean Fuzzy Sets and Applications to Pattern Recognition. Pythagorean Fuzzy Sets: Theory and Applications, (2021)  83.

4. Ezgi Türkarslan, Mehmet Ünver, Murat Olgun, A Vector Valued Similarity Measure Based on the Choquet Integral for Intuitionistic Fuzzy Sets and Its Application to Pattern Recognition, Lecture Notes in Networks and Systems, (2022), 308, pp. 84–92. Doi: 10.1007/978-3-030-85577-2_10.


1    University of Missouri -USA (01-09-2012 / 30-11-2012)

Universität Osnabrück -Germany (21-05-2012 / 25-05-2012)


American Mathematical Society, 2016-*.


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