C O M M U N I C A T I O N S
Series A1:
Mathematics and Statistics
VOLUME: 65 Number: 2 YEAR: 2016
Abstracted/Indexed in
Mathematical Reviews (MathSciNet), Zentralblatt MATH (ZbMATH) , TUBITAK-Ulakbim
Faculty of Sciences, Ankara University 06100 Beşevler, Ankara-Turkey
ISSN 1303-5991
DE LA FACULTE DES SCIENCES
DE L’UNIVERSITE D’ANKARA
FACULTY OF SCIENCES
ANKARA UNIVERSITY
C O M M U N I C A T I O N S
DE LA FACULTE DES SCIENCES FACULTY OF SCIENCES DE L’UNIVERSITE D’ANKARA ANKARA UNIVERSITY
Series A1: Mathematics and Statistics Owner Hüseyin BEREKETOĞLU Editor in Chief Nuri ÖZALP Managing Editor Erdal GÜNER Area Editors
Sait HALICIOĞLU (Group Theory) Elif DEMİRCİ (Applied Mathematics) Gülen TUNCA (Analysis-Theory of Functions) Murat OLGUN (Functional Analysis)
Yusuf YAYLI (Geometry) İshak ALTUN (Topology)
Yılmaz AKDİ (Statistics) Murat ŞAHİN(Number Theory)
Burcu Ungor (Rings and Modules Theory)
Editors
M.AKHMET METU, TURKEY O. ARSLAN Ankara Uni. TURKEY A. AYTUNA Sabancı Uni. TURKEY E. BAIRAMOV Ankara Uni. TURKEY H. BEREKETOĞLU Ankara Uni. TURKEY H. BOZDOĞAN Uni. of Tennessee, USA C.Y.CHAN, Univ. of Louisiana, USA A. B. EKİN Ankara Uni. TURKEY D. GEORGIOU Uni. of Patras GREECE V. GREGORI Uni. Politècnica de València, SPAIN I. GYORI Veszprem Uni. HUNGARY A. HARMANCI Hacettepe Uni. TURKEY F.HATHOUT Uni. de Saïda, ALGERIA K. ILARSLAN Kırıkkkale Uni. TURKEY A. KABASINSKAS Kaunas U. of Tech., LITHUANIA V. KALANTAROV Koç Uni. TURKEY F. KARAKOC Ankara Uni. TURKEY A. M. KRALL The Penn. State Uni. USA H.P. KUNZI Uni. of Cape Town, SOUTH AFRICA S. KOKSAL, Florida Inst. of Tech. USA H.T. LIU, Tatung Univ. TAIWAN S. ROMAGUERA Un.Pol.de València, SPAIN C. ORHAN Ankara Uni. TURKEY C. TEZER METU TURKEY A.D. TÜRKOĞLU Gazi Uni. TURKEY S. YARDIMCI Ankara Uni. TURKEY C. YILDIZ Gazi Uni. TURKEY
This Journal is published two issues in a year by the Faculty of Sciences, University of Ankara. Articles and any other material published in this journal represent the opinions of the author(s) and should not be construed to reflect the opinions of the Editor(s) and the Publisher(s).
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COMMUNICATIONS EDITORIAL OFFICE
Ankara University, Faculty of Sciences 06100 Tandoğan, ANKARA – TURKEY
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e-mail: commun@science.ankara.edu.tr
http://communications.science.ankara.edu.tr/index.php?series=A1
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C O M M U N I C A T I O N S
Volume 65 Number : 2 Year :2016
Series A1: Mathematics and Statistics
I. EROGLU, E. GUNER, Separation axioms in Cech closure ordered spaces …... 1 A. TUNCER, Survival probabilities for compound binomial risk Model with discrete phase-type claims ………... 11 T. GULSEN, E. YILMAZ, Inverse nodal problem for p-Laplacian diffusion equation with polynomially dependent spectral parameter ...………. 23 T. ERMİŞ, Ö. GELİŞGEN, On an extension of the polar taxicab distance in space ….. 37 H. KADIOĞLU, On the prolongations of homogeneous vector bundles ..…..……… 47 H. ŞİMŞEK, M. ÖZDEMİR, On focal surfaces formed by timelike normal rectilinear congruence ………..……… 55 T. YURDAKADIM, Some Korovkin type results via power series method in modular spaces ………... 65 Y. ALTIN, 𝜆 −almost difference sequences of fuzzy numbers ……… 77 E. BAS, Inverse singular spectral problem via Hocshtadt-Lieberman method ……..…. 89 A.KARAISA, A. ARAL, Some approximation properties of Kantorovich variant of Chlodowsky operators based on q-integer ………..……...……….. 97 E. DENIZ, Quantitative estimates for Jain-Kantorovich operators . .………. 121 M. YILDIRIM, K. İLARSLAN, Semi-parallel tensor product surfaces in
semi-Euclidean spaceE₂⁴ ……… 133
N. BAYRAK GÜRSES, O. BEKTAS, S. YUCE, Special Smarandache curves in ℝ1 3 ……….………... 143
B. ZEYNEP TEMOCIN, A. S. SELCUK-KESTEL, Estimation of earthquake insurance premium rates: Turkish catastrophe insurance pool case ……… 161 E. KIZILOK KARA, S. ACIK KEMALOGLU, Portfolio optimization of dynamic copula models for dependent financial data using change point approach ………. 175 K. R. KAZMI, SHAKEEL A. ALVI, Sensitivity analysis for a parametric multi-valued implicit quasi variational-like inclusion ………... 189
C O M M U N I C A T I O N S
DE LA FACULTE DES SCIENCES FACULTY OF SCIENCES DE L’UNIVERSITE D’ANKARA ANKARA UNIVERSITY
