Güncel Gönderiler: Matematik Bölümü
Toplam kayıt 544, listelenen: 281-300
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Spherical product surfaces in e-4
(Ovidius Univ Press, 2012)In the present study we calculate the coefficients of the second fundamental form and curvature ellipse of spherical product surfaces in E-4. Otsuki rotational surfaces and Ganchev-Milousheva rotational surfaces are the ... -
On approximation in Weighted Orlicz spaces
(Walter De Gruyter Gmbh, 2012)An inverse theorem of the trigonometric approximation theory in Weighted Orlicz spaces is proved and the constructive characterization of the generalized Lipschitz classes defined in these spaces is obtained. -
Characterizations of generalized quasi-einstein manifolds
(Ovidius Univ Press, 2012)We give characterizations of generalized quasi-Einstein manifolds for both even and odd dimensions. -
On conformally flat almost pseudo-ricci symmetric spacetimes
(Springer/Plenum Publishers, 2012)We consider a conformally flat almost pseudo-Ricci symmetric spacetime. At first we show that a conformally flat almost pseudo-Ricci symmetric spacetime can be taken as a model of the perfect fluid spacetime in general ... -
Generalized rotation surfaces in E^4
(Springer Basel AG, 2012)In the present study we consider generalized rotation surfaces imbedded in an Euclidean space of four dimensions. We also give some special examples of these surfaces in . Further, the curvature properties of these surfaces ... -
Approximating polynomials for functions of weighted smirnov-orlicz spaces
(Hindawi Ltd, 2012)Let G(0) and G(infinity) be, respectively, bounded and unbounded components of a plane curve Gamma satisfying Dini's smoothness condition. In addition to partial sum of Faber series of f belonging to weighted Smirnov-Orlicz ... -
Trigonometric approximation by matrix transforms in l-p(x) spaces
(World Scientific Publ Co Pte Ltd, 2012)The Lipschitz classes Lip(alpha, p(x)), 0 < alpha <= 1 are defined for the Lebesgue spaces L-p(x) with variable exponent p(x), and the degree of approximation by matrix transforms of f is an element of Lip(alpha, p(x)) is ... -
Approximation by interpolating polynomials in weighted symmetric smirnov spaces
(Hacettepe University, 2012)Let Gamma subset of C be a closed BR curve without cusps. In this work approximation by complex interpolating polynomials in a Weighted Symmetric Smirnov Space is studied. It is proved that the convergence rate of complex ... -
Some convolution inequalities in musielak oricz spaces
(Inst Mathematics & Mechanics, 2016)Uniform boundedness of some family of convolution-type operators with kernels, such as Steklov, Poisson, Cesaro, De la Vallee-Poussin, Fejer, Jackson, having some properties are investigated in Musielak Orlicz spaces. As ... -
Binary soft set theory
(European Journal Pure, 2016)In this paper, we study the concept of soft sets theory which introduced by Molodtsov [9] and the theory of soft sets which studied by Maji et al. [6]. The authors introduce a binary soft set on two initial universal sets ... -
Convolutions and best approximations in variable exponent lebesgue spaces
(Editura Acad Romane, 2016)In the variable exponent Lebesgue spaces a convolution is defined and its estimations in the variable exponent Lebesgue spaces by the best approximation numbers are obtained. -
N(k)-quasi einstein manifolds satisfying certain conditions
(Pergamon-Elsevier Science Ltd, 2008)We consider N(k)-quasi Einstein manifolds satisfying the conditions. R(epsilon,X), P = 0, P(epsilon, X), S = 0 and P = 0. We construct physical examples of N(k)-quasi Einstein space-times. -
Improved direct and converse theorems in weighted Lorentz spaces
(Belgian Mathematical Soc Triomphe, 2016)In the present work we prove the equivalence of the fractional modulus of smoothness to the realization functional and to the Peetre K-functional in weighted Lorentz spaces. Using this equivalence we obtain an improvement ... -
Chen inequalities for submanifolds of real space forms with a semi-symmetric non-metric connection
(Canadian Mathematical Soc, 2012)In this paper we prove Chen inequalities for submanifolds of real space forms endowed with a semi-symmetric non-metric connection, i.e., relations between the mean curvature associated with a semi-symmetric non-metric ... -
Multiplier theorems in weighted smirnov spaces
(Korean Mathematical Soc, 2008)The analogues of Marcinkiewicz multiplier theorem and Littlewood-Paley theorem are proved for p-Faber series in weighted Smirnov spaces defined on bounded and unbounded components of a rectifiable Jordan curve. -
On parametric s-metric spaces and fixed-point type theorems for expansive mappings
(Hindawi Ltd, 2016)We introduce the notion of a parametric S-metric space as generalization of a parametric metric space. Using some expansive mappings, we prove a fixed-point theorem on a parametric S-metric space. It is important to obtain ... -
Approximation by polynomials and rational functions in weighted rearrangement invariant spaces
(Academic Press Inc Elsevier Science, 2008)Let Gamma be a Dini-smooth curve in the complex plane, and let G := lnt Gamma. We prove some direct and inverse theorems of approximation theory by algebraic polynomials and rational functions in the weighted rearrangement ... -
Fractional diffusion-wave problem in cylindrical coordinates
(Elsevier Science Bv, 2008)in this Letter, we present analytical and numerical solutions for an axis-symmetric diffusion-wave equation. For problem formulation. the fractional time derivative is described in the sense of Riemann-Liouville. The ... -
Generalized sasakian space forms with semi-symmetric metric connections
(Unıv Al I Cuza, Fac Math, 2014)The aim of the present paper is to introduce generalized Sasakian space forms endowed with semi-symmetric metric connections. We obtain the existence theorem of a generalized Sasakian space form with semi-symmetric metric ... -
On Biharmonic Legendre curves in S-space forms
(Scientific Technical Research Council Turkey-Tubitak, 2014)We study biharmonic Legendre curves in S-space forms. We find curvature characterizations of these special curves in 4 cases.
