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TURKISH JOURNAL OF MATHEMATICS
Turk J Math
E-ISSN: 1303-6149
ISSN: 1300-0098
Year: 2021 Volume: 45 Number: 2
  • Cover and Contents


    1. Notes on multivalent Bazilevic functions defined by higher order derivatives
      MOHAMED K. AOUF, ADELA O. MOSTAFA, TEODOR BULBOACA
      Turk J Math, 45, (2021), 624-633
      Abstract   Full Text: PDF

    2. Order compact and unbounded order compact operators
      NAZİFE ERKURŞUN ÖZCAN, NİYAZİ ANIL GEZER, ŞAZİYE ECE ÖZDEMİR, İREM MESUDE GEYİKÇİ
      Turk J Math, 45, (2021), 634-646
      Abstract   Full Text: PDF

    3. Exact and nonstandard finite difference schemes for the Burgers equation B(2,2)
      CANAN KÖROĞLU, AYHAN AYDIN
      Turk J Math, 45, (2021), 647-660
      Abstract   Full Text: PDF

    4. Dynnikov coordinates on punctured torus
      ALEV MERAL
      Turk J Math, 45, (2021), 661-677
      Abstract   Full Text: PDF

    5. Close-to-convexity of a class of harmonic mappings defined by a third-order differential inequality
      ELİF YAŞAR, SİBEL YALÇIN TOKGÖZ
      Turk J Math, 45, (2021), 678-694
      Abstract   Full Text: PDF

    6. Portfolio optimization with two quasiconvex risk measures
      ÇAĞIN ARARAT
      Turk J Math, 45, (2021), 695-717
      Abstract   Full Text: PDF

    7. Gauss-Bonnet theorems and the Lorentzian Heisenberg group
      Tong Wu, SINING WEI, YONG WANG
      Turk J Math, 45, (2021), 718-741
      Abstract   Full Text: PDF

    8. A new implicit-explicit local differential method for boundary value problems
      HÜSEYİN TUNÇ, MURAT SARI
      Turk J Math, 45, (2021), 742-766
      Abstract   Full Text: PDF

    9. On a fifth-order nonselfadjoint boundary value problem
      EKİN UĞURLU, KENAN TAŞ
      Turk J Math, 45, (2021), 767-781
      Abstract   Full Text: PDF

    10. On rings whose Jacobson radical coincides with upper nilradical
      GUANGLIN MA, YAO WANG, YANLI REN
      Turk J Math, 45, (2021), 782-796
      Abstract   Full Text: PDF

    11. Estimations on some hybrid exponential sums related to Kloosterman sums
      YINGJIE CHENG, XIWANG CAO, LIQIN QIAN, JINLONG WAN
      Turk J Math, 45, (2021), 797-819
      Abstract   Full Text: PDF

    12. On some generalizations of the beta function in several variables
      MUSTAPHA RAISSOULI, SALMA EL-SOUBHY
      Turk J Math, 45, (2021), 820-842
      Abstract   Full Text: PDF

    13. T$_{4}$, Urysohn's lemma, and Tietze extension theorem for constant filter convergence spaces
      TESNİM MERYEM BARAN, AYHAN ERCİYES
      Turk J Math, 45, (2021), 843-855
      Abstract   Full Text: PDF

    14. The Lebesgue constants on projective spaces
      ALEXANDER KUSHPEL
      Turk J Math, 45, (2021), 856-863
      Abstract   Full Text: PDF

    15. Existence of nonnegative solutions for discrete Robin boundary value problems with sign-changing weight
      YAN ZHU
      Turk J Math, 45, (2021), 864-877
      Abstract   Full Text: PDF

    16. On elements whose Moore-Penrose inverse is idempotent in a ${\ast}$-ring
      HAIYANG ZHU, JIANLONG CHEN, YUKUN ZHOU
      Turk J Math, 45, (2021), 878-889
      Abstract   Full Text: PDF

    17. Completeness conditions of systems of Bessel functions in weighted $L^2$-spaces in terms of entire functions
      RUSLAN KHATS'
      Turk J Math, 45, (2021), 890-895
      Abstract   Full Text: PDF

    18. Volume properties and some characterizations of ellipsoids in ${\Bbb E}^{n+1}$
      DONG-SOO KIM, INCHEON KIM, YOUNG HO KIM
      Turk J Math, 45, (2021), 896-908
      Abstract   Full Text: PDF

    19. On ordered $\Gamma$-hypersemigroups, minimal bi-ideals, and minimal left ideals
      NIOVI KEHAYOPULU
      Turk J Math, 45, (2021), 909-918
      Abstract   Full Text: PDF

    20. New oscillation criteria for differential equations with sublinear and superlinear neutral terms
      ALI MUHIB, ELMETWALLY M. ELABBASY, OSAMA MOAAZ
      Turk J Math, 45, (2021), 919-928
      Abstract   Full Text: PDF

    21. Korovkin type approximation via triangular $A-$statistical convergence on an infinite interval
      SELİN ÇINAR, SEVDA YILDIZ, KAMİL DEMİRCİ
      Turk J Math, 45, (2021), 929-942
      Abstract   Full Text: PDF

    22. Oscillation tests for nonlinear differential equations with nonmonotone delays
      NURTEN KILIÇ
      Turk J Math, 45, (2021), 943-954
      Abstract   Full Text: PDF

    23. Some properties of second-order weak subdifferentials
      GONCA İNCEOĞLU
      Turk J Math, 45, (2021), 955-960
      Abstract   Full Text: PDF

    24. Almost quasi clean rings
      TUFAN ÖZDİN
      Turk J Math, 45, (2021), 961-970
      Abstract   Full Text: PDF

    25. Some soft topological properties and fixed soft element results in soft complex valued metric spaces
      İZZETTİN DEMİR
      Turk J Math, 45, (2021), 971-987
      Abstract   Full Text: PDF

    26. On the spectral and scattering properties of eigenparameter dependent discrete impulsive Sturm-Liouville equations
      YELDA AYGAR KÜÇÜKEVCİLİOĞLU, ELGİZ BAYRAM, GÜHER GÜLÇEHRE ÖZBEY
      Turk J Math, 45, (2021), 988-1000
      Abstract   Full Text: PDF

    27. Unitals in projective planes of order 16
      STOICHO DIMITROV STOICHEV, MUSTAFA GEZEK
      Turk J Math, 45, (2021), 1001-1014
      Abstract   Full Text: PDF

    28. Operators between different weighted Frechet and (LB)-spaces of analytic functions
      ERSİN KIZGUT
      Turk J Math, 45, (2021), 1015-1029
      Abstract   Full Text: PDF

    29. Preservers of the local spectral radius zero of Jordan product of operators
      MHAMED ELHODAIBI, SOMAYA SABER
      Turk J Math, 45, (2021), 1030-1039
      Abstract   Full Text: PDF

    30. Hardy-Copson type inequalities for nabla time scale calculus
      ZEYNEP KAYAR, BİLLUR KAYMAKÇALAN
      Turk J Math, 45, (2021), 1040-1064
      Abstract   Full Text: PDF