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Browsing Matematik Bölümü by Title

Browsing Matematik Bölümü by Title

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  • Akhmet, M.; Fen, M.O. (L and H Scientific Publishing, LLC, 2018)
    Periodicity plays a significant role in the chaos theory from the beginning since the skeleton of chaos can consist of infinitely many unstable periodic motions. This is true for chaos in the sense of Devaney [1], Li-Yorke ...
  • Medetoğulları, E.; Atalan, F. (SPRINGER, ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES, 2020-09)
    Let p : (N) over tilde -> N be a finite covering space for nonorientable surfaces, where chi((N) over tilde) < 0. We study whether or not p has the Birman-Hilden property.
  • Gulyaz, Selma; Karapinar, Erdal; Yuce, Ilker Savas (SPRINGER INTERNATIONAL PUBLISHING AG, GEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND, 2013)
    In this manuscript, we discuss the existence of a coupled coincidence point for mappings and , where F has the mixed g-monotone property, in the context of partially ordered metric spaces with an implicit relation. Our ...
  • Geridönmez, B. Pekmen; Öztop, Hakan F. (ELSEVIER, 2021-01-01)
    In this paper, mixed convection flow of a hybrid nanofluid is numerically studied in a backward facing step channel in the presence of a uniform partial magnetic field. Four different inlet velocity profiles are also taken ...
  • Akhmet, Marat; Fen, Mehmet Onur (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, ATATURK BULVARI NO 221, KAVAKLIDERE, TR-06100 ANKARA, TURKEY, 2017)
    Recently we introduced the concept of Poincare chaos. In the present paper, by means of the Bebutov dynamical system, an unpredictable solution is considered as a generator of the chaos in a quasilinear system. The results ...
  • Akhmet, Marat; Fen, Mehmet Onur; Alejaily, Ejaily Milad (SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY, 2019)
    The sea surface temperature (SST) variability is clearly affected by global climate patterns, which involve large-scale ocean-atmosphere fluctuations similar to the El Nino-Southern Oscillation (ENSO). We give mathematical ...
  • Gül, Şükran; Uria-Albizuri, Jone (EUROPEAN MATHEMATICAL SOC, PUBLISHING HOUSE, E T H-ZENTRUM SEW A27, SCHEUCHZERSTRASSE 70, CH-8092 ZURICH, SWITZERLAND, 2020)
    If G is a Grigorchuk-Gupta-Sidki group defined over a p-adic tree, where p is an odd prime, we study the existence of Beauville surfaces associated to the quotients of G by its level stabilizers st(G)((n)). We prove that ...
  • Fen, Mehmet Onur; Fen, Fatma Tokmak (WALTER DE GRUYTER GMBH, GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY, 2017)
    In this paper, we present a method to generate homoclinic and heteroclinic motions in impulsive systems. We rigorously prove the presence of such motions in the case that the systems are under the influence of a discrete ...
  • Fen, Mehmet Onur; Fen, Fatma Tokmak (SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, 2019)
    The dynamics of retarded shunting inhibitory cellular neural networks (SICNNs) with rectangular input currents is investigated from the asymptotic point of view. It is rigorously proved that such networks possess homoclinic ...
  • Geridönmez, B. Pekmen; Jamal, Muhammad; Hussain, Shafqat (ELSEVIER, 2021-03)
    This study deals the influence of fins and inclined magnetic field with nanofluid in single lid-driven and double lid-driven cavities. The effect of fins length and distance between them is also given attention. A two ...
  • Medetoğulları, Elif; Atalan, Ferihe; Ozan, Yıldıray (ELSEVIERRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2021-02-01)
    In this note, we investigate the property for regular branched finite abelian covers of the real projective plane, where each homeomorphism of the base (preserving the branch locus) lifts to a homeomorphism of the covering ...
  • Medetoğulları, Elif; Atalan, Ferihe; Ozan, Yıldıray (SPRINGER BASEL AG, PICASSOPLATZ 4, BASEL, 4052, SWITZERLAND, 2020-11)
    We investigate branched regular finite abelian A-covers of the 2-sphere, where every homeomorphism of the base (preserving the branch locus) lifts to a homeomorphism of the covering surface. In this study, we prove that ...
  • Geridonmez, Bengisen Pekmen (TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA, 2019)
    In this study, numerical simulation of hydrothermal behaviour of ethylene glycol based CuO nanofluid in a semi-annulus with a magnetic source is investigated. The non-dimensional governing equations are discretized by ...
  • Akhmet, Marat; Fen, Mehmet Onur; Alejaily, Ejaily Milad (ASSOC COMPUTING MACHINERY, 1515 BROADWAY, NEW YORK, NY 10036-9998 USA, 2018)
    A new method of fractals construction based on Fatou-Julia iteration is proposed. We develop a non-ordinary way to map fractal into a new fractal, where the mapping function is involved in the dynamics of the generated ...
  • Geridönmez, B. Pekmen; Öztop, H. F. (PERGAMON-ELSEVIER SCIENCE LTD, 2020-12-15)
    In this study, a numerical investigation on nanofluid flow and heat transfer is presented in a cavity under the effects of cross partial magnetic fields and a partial heater. The governing stream function-vorticity equations ...
  • Geridonmez, Bengisen Pekmen; Öztop, Hakan F. (TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA, 2020-07)
    Mixed convection flow in a lid-driven cavity in the presence of a uniform partial magnetic field is investigated utilizing the pseudo spectral method based on polyharmonic spline radial basis functions. The two-dimensional ...
  • Pekmen Geridönmez, Bengisen; Öztop, Hakan Fehmi (Elsevier Ltd, 2019)
    Natural convection flow in presence of partially applied magnetic field in a porous medium is investigated in this study. Partial magnetic field is applied horizontally in the direction of positive x-axis, and vertical ...
  • Geridönmez, B. Pekmen; Öztop, Hakan F. (PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2020-05)
    In this study, natural convection in a differentially heated square cavity is investigated under the influence of a partial uniform magnetic field applied from either the left bottom corner of the heated wall or the right ...
  • Geridönmez, Bengisen Pekmen; Öztop, Hakan F. (WILEY111 RIVER ST, HOBOKEN 07030-5774, NJ, 2021-05-30)
    In this paper, the effect of uniform partial magnetic field is studied on natural convection flow in an open ended square cavity considering thermal radiation and the presence of two fins as well as a uniform partial ...
  • Geridonmez, Bengisen Pekmen (ASME, TWO PARK AVE, NEW YORK, NY 10016-5990 USA, 2020-02)
    In this study, a novel procedure is proposed to determine the shape parameter of multiquadric (MQ) radial basis function (RBF) utilizing multivariate adaptive regression splines (Mars) in a free convection problem. Input ...

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