Güncel Gönderiler: Matematik-Makale Koleksiyonu
Toplam kayıt 499, listelenen: 401-420
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Principal congruence subgroups of the hecke groups and related results
(Springer Heidelberg, 2009)In this paper, first, we determine the quotient groups of the Hecke groups H(lambda(q)), where q >= 7 is prime, by their principal congruence subgroups H-p(lambda(q)) of level p, where p is also prime. We deal with the ... -
Approximation properties of hexagonal Fourier series in the generalized Hölder metric
(Heldermann Verlag, 2013)The generalized Holder classes of -periodic continuous functions are defined, and the approximation properties of CesA ro and Abel-Poisson means of hexagonal Fourier series of such functions are investigated in the Holder metric. -
Some normal subgroups of extended generalized Hecke groups
(Hacettepe University, 2016)Generalized Hecke group H-p,H-infinity (lambda) is generated by X(z) = -(z - lambda(p))(-1) and Y(z) = -(z + lambda)(-1) where lambda(p) = 2 cos pi/p, p >= 2 integer and lambda >= 2. Extended generalized Hecke group (H) ... -
Approximation by Faber-Laurent rational functions in Lebesgue spaces with variable exponent
(Elsevier Science BV, 2016)Let Gamma be a rectifiable Dini-smooth Jordan curve in the complex plane C. In this work the approximation properties of the Faber-Laurent series expansions in the variable exponent Lebesgue spaces defined on the curve ... -
Polynomial approximation in bergman spaces
(Springer, 2016)We obtain Jackson and converse inequalities for the polynomial approximation in Bergman spaces. Some known results presented for the moduli of continuity are extended to the moduli of smoothness. We also prove some ... -
Approximation by riesz means of hexagonal fourier series
(European Mathematical Soc, 2017)Let f be an H-periodic (periodic with respect to the hexagon lattice) Holder continuous function of two real variables. The error vertical bar vertical bar f-R-n (pk; f)vertical bar vertical bar is estimated in the uniform ... -
Control of thermal stresses in axissymmetric problems of fractional thermoelasticity for an infinite cylindrical domain
(Vinca Inst Nuclear Sci, 2017)In this paper, we study a control problem of thermal stresses in an infinite cylindrical body. The temperature distribution is defined by the time-fractional heat conduction equation with the Caputo derivative of the order ... -
The dirichlet problem of a conformable advection-diffusion equation
(Vinca Inst Nuclear Sci, 2017)The fractional advection-diffusion equations are obtained from a fractional power law for the matter flux. Diffusion processes in special types of porous media which has fractal geometry can be modelled accurately by using ... -
On the characterizations of f-biharmonic legendre curves in sasakian space forms
(Univ Nis, 2017)We consider f-biharmonic Legendre curves in Sasakian space forms. We find curvature characterizations of these types of curves in four cases. -
Simultaneous approximation of the Riemann conformal map and its derivatives by Bieberbach polynomials
(Hacettepe Univ, 2017)Let G be a domain in the complex plane C bounded by a rectifiable Jordan curve Gamma, let z(0) is an element of G and let phi(0) be the Riemann conformal map of G onto D-r= {w is an element of C:vertical bar w vertical ... -
Conformable heat equation on a radial symmetric plate
(Vinca Inst Nuclear Sci, 2017)The conformable heat equation is defined in terms of a local and limit-based definition called conformable derivative which provides some basic properties of integer order derivative such that conventional fractional ... -
f-Biminimal immersions
(Scientific Technical Research Council Turkey-Tubitak, 2017)In the present paper, we define f-biminimal immersions. We consider f-biminimal curves in a Riemannian manifold and f-biminimal submanifolds of codimension 1 in a Riemannian manifold, and we give examples of f-biminimal ... -
Some fixed point theorems on s-metric spaces
(Math Soc Serbia-Drustvo Matematicara Srbije, 2017)In this paper, we present some contractive mappings and prove new generalized fixed point theorems on S-metric spaces. Also we define the notion of a cluster point and investigate fixed points of self-mappings using cluster ... -
New fixed-circle results on s-metric spaces
(Int Center Scientific Research & Studies, 2017)In this paper our aim is to study some fixed-circle theorems on 5 metric spaces. For this purpose we give new examples of S-metric spaces and investigate some relationships between circles on metric and S-metric spaces. ... -
Metallic shaped hypersurfaces in lorentzian space forms
(Union Matematica Argentina, 2017)We show that metallic shaped hypersurfaces in Lorentzian space forms are isoparametric and obtain their full classification. -
On magnetic curves in the 3-dimensional heisenberg group
(Inst Mathematics & Mechanics, 2017)We consider normal magnetic curves in 3-dimensional Heisenberg group H-3 : We prove that gamma is a normal magnetic curve in H-3 if and only if it is a geodesic obtained as an integral curve of e(3) or a non-Legendre slant ... -
Some new contractive mappings on S-metric spaces and their relationships with the mapping (S25)
(Springer Heidelberg, 2017)Recently, S-metric spaces are introduced as a generalization of metric spaces. In this paper, we consider the relationships between of an S-metric space and a metric space, and give an example of an S-metric which does not ... -
On translation surfaces in 4-dimensional Euclidean space
(Univ Tartu Press, 2016)We consider translation surfaces in Euclidean spaces. Firstly, we give some results of translation surfaces in the 3-dimensional Euclidean space E-3. Further, we consider translation surfaces in the 4-dimensional Euclidean ... -
Optimal control of convective FitzHugh-Nagumo equation
(Pergamon-Elsevier Science Ltd, 2017)We investigate smooth and sparse optimal control problems for convective FitzHugh Nagumo equation with traveling wave solutions in moving excitable media. The cost function includes distributed space time and terminal ... -
Generalized derivatives and approximation in weighted Lorentz spaces
(Belgian Mathematical Soc Triomphe, 2017)In the present article we prove direct, simultaneous and converse approximation theorems by trigonometric polynomials for functions f and (psi, beta)-derivatives of f in weighted Lorentz spaces.
