Now showing items 130-149 of 210

    • On a subclass of harmonic mappings 

      Yavuz Duman, Emel; Kahramaner, Yasemin; Polatoğlu, Yaşar (2013)
      In the present paper we extent the fundamental property that if h(z) and g(z) are regular functions in the open unit disc D with the properties h(0) = g(0) = 0, h(z) maps D onto λ-spiral region and Ren e iλ ...
    • On Complex Characters of SL 4 q 

      Yelkenkaya, Neşe (2001)
    • On Gaussian Sums Over Finite Fields 

      Yelkenkaya, Neşe (İstanbul University Science Faculty, 1997)
      In this paper, it has been determined the sings of normed Gaussian sums over finite fields.
    • On Gaussian Sums Over Finite Fields II 

      YelkenKaya, Neşe (İstanbul Kültür Üniversitesi Yayınları, 2002-04)
      Let Fq:=GF(q) be a finite field of order q=ps for some s N, where p is an odd prime, and Fq=F( ), where F=Fp. Let =Fq-{0}= and K:= . Let be a non-trivial irreducible character of the additive group of Fq such that ...
    • On generalized Janowski starlike logharmonic 

      Mohd, Maisarah Haji; Darus, Maslina; Polatoğlu, Yaşar; Yavuz Duman, Emel (2011)
      In this paper, we consider univalent logharmonic mappings of the form f(z) = zh(z)g(z) defined on the open unit disc with the normalization condition g(0) = 1 and h(0) 6= 0. We investigate the class of generalized ...
    • On Janowski starlike functions 

      Çağlar, Mert; Polatoğlu, Yaşar; Şen, A.; Yavuz, Emel; Owa, Shigeyoshi (Springer International Publishing Ag, Gewerbestrasse 11, Cham, Ch-6330, Switzerland, 2007)
      For analytic functions f(z) in the open unit disc U with f(0) = 0 and f'(0) = 1, applying the fractional calculus for f(z), a new fractional operator D-lambda f(z) is introduced. Further, a new subclass F-lambda(*)(A, B) ...
    • On positive operators without invariant sublattices 

      Çağlar, Mert; Gönülli, Uğur; Mısırlıoğlu, Remzi Tunç (2009)
      By slightly modifying some of the examples given in [6], we obtain further examples of positive operators on the discrete Banach lattices c0, c, and `p (1 ≤ p < ∞) without non-trivial closed invariant sublattices.
    • On Q-Euclidean L-fuzzy Ideals of Rings 

      Koç, Ayten; Balkanay, Erol (TÜBİTAK, 2004)
      In this paper we define a θ-Euclidean level subset and a θ-Euclidean level ideal. We also give some properties of a θ-Euclidean level subset.
    • On quasiconformal harmonic mappings lifting to minimal surfaces 

      Taştan, Hakan Mete; Polatoğlu, Yaşar (Scientific Technical Research Council Turkey-Tubitak, Ataturk Bulvarı No 221, Kavaklıdere, Tr-06100 Ankara, Turkey, 2013)
      We prove a growth theorem for a function to belong to the class Sigma(mu; a) and generalize a Weierstrass-Enneper representation type theorem for the minimal surfaces given in [5] to spacelike minimal surfaces which lie ...
    • On some alpha-convex functions 

      Owa, Shigeyoshi; Polatoğlu, Yaşar; Yavuz, Emel; Acu, Mugur; Al-Oboudi, Fatima; Darus, Maslina (2008-06)
      In this paper, we define a general class of α-convex functions, denoted by MLβ,α(q), with respect to a convex domain D (q(z) ∈ Hu(U), q(0) = 1 , q(U) = D) contained in the right half plane by using the linear operator ...
    • On some first-order differential subordination 

      Yavuz, Emel; Nunokawa, M.; Sokół, J.; Cho, N.E.; Owa, S. (2014-07)
      Let denote the class of functions f that are analytic in the unit disc and normalized by f(0) = f′(0) − 1 = 0. In this paper, we investigate the class of functions such that in . We determine conditions for α and β under ...
    • On subclass of multivalent close-to-convex harmonic functions 

      Polatoğlu, Yaşar; Yavuz Duman, Emel; Özkan, H. Esra (2009)
    • On the class of harmonic mappings which is related to the class of bounded boundary rotation 

      Polatoğlu, Yaşar; Aydoğan, Melike; Kahramaner, Yasemin (Elsevier Science Inc, 360 Park Ave South, New York, Ny 10010-1710 Usa, 2015-09-15)
      The class of bounded radius of rotation is generalization of the convex functions. The concept of functions bounded boundary rotation originated from Loewner (1917). But he did not use the present terminology. It was Paatero ...
    • On the regularity of the monomial point of a border basis scheme 

      Kreuzer, M.; Sipal, B.; Long, L.N. (2020)
      The border basis scheme BO parametrizes all 0-dimensional ideals in K[x1, … , xn] , where K is an arbitrary field, which have a border basis with respect to a given order ideal of terms O. Its vanishing ideal I(BO) is ...
    • Order-unit-metric spaces 

      Çağlar, Mert; Ercan, Zafer (Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands, 2014-09)
      We study the concept of cone metric space in the context of ordered vector spaces by setting up a general and natural framework for it.
    • Paradoks 

      Güzel, Erhan (2015-07-10)
    • Partial sums of certain univalent functions 

      Hayami, Toshio; Kuroki, Kazuo; Yavuz Duman, Emel; Owa, Shigeyoshi (2012)
      The partial sums f3(z) of some extermal functions for various classes S∗, K and R of starlike functions, convex functions and functions with positive real part in the open unit disk U, respectively, are discussed. In ...
    • Phase transformation in the system TlBi(Te1-xSex)(2) 

      Chrissaris, K.; Vinga, E. S.; Özer, Mehmet; Paraskevopoullos, K. M.; Polychroniadis, E. K. (Wiley-V C H Verlag GMBH, Po Box 10 11 61, D-69451 Weinheim, Germany, 2004-04)
      TlBiTe2 and TlBiSe2 -that are ternary analogs of the IV-VI semiconductors-, although they crystallize in the same space group R (3) over barm (D-3d(5)), exhibit different behaviour during heating. The observed phase ...