Matematik Bölümü: Recent submissions
Now showing items 201-220 of 552
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On C-parallel legendre curves in non-sasakian contact metric manifolds
(Univ NIS, 2019)In (2n + 1)-dimensional non-Sasakian contact metric manifolds, we consider Legendre curves whose mean curvature vector fields are C-parallel or C-proper in the tangent or normal bundles. We obtain the curvature characterizations ... -
Mixed modulus of smoothness with Muckenhoupt weights and approximation by angle
(Taylor & Francis LTD, 2019)Mixed modulus of smoothness in weighted Lebesgue spaces with Muckenhoupt weights are investigated. Using mixed modulus of smoothness we obtain Potapov type direct and inverse estimates of angular trigonometric approximation ... -
Rotational submanifolds in Euclidean spaces
(World Scientific Publ CO PTE LTD, 2019)The rotational embedded submanifold was first studied by Kuiper as a submanifold in En+d The generalized Beltrami submanifolds and toroidal submanifold are the special examples of these kind of submanifolds. In this paper, ... -
Fixed-discs in rectangular metric spaces
(MDPI, 2019)In this manuscript, we present some results related to fixed-discs of self-mappings in rectangular metric spaces. To do this, we give new techniques modifying some classical notions such as Banach contraction principle, ... -
Complex Conformable Derivative
(Springer Heidelberg, 2019)In this study, we introduce a new complex conformable derivative and integral with noninteger order which coincides the classical complex derivative and integral for = 1. We examine basic properties of these newly defined ... -
Generalızed pell sequences related to the extended generalızed hecke groups (H)over-bar(3,q) and an applıcatıon to the group (h)over-bar(3,3)
(Honam Mathematical Soc, 2019)We consider the extended generalized Hecke groups (H) over bar (3,q) generated by X (z) = -(z - 1)(-1), Y (z) = -(z + lambda(q))(-1) with lambda(q) = 2 cos(pi/q) where q >= 3 an integer. In this work, we study the generalized ... -
The connections between continued fraction representations of units and certain hecke groups
(Malaysian Mathematical Sciences Soc, 2010)Let lambda = root D where D is a square free integer such that D = m(2)+1 for m = 1,3, 4, 5,..., or D = n(2) - 1 form = 2, 3, 4, 5,.... Also, let H(lambda) be the Hecke group associated to A. In this paper, we show that ... -
Improved converse theorems and fractional moduli of smoothness in Orlicz spaces
(Malaysian Mathematical Sciences Soc, 2013)In the present work converse theorems of trigonometric approximation of functions and its fractional derivatives in certain Orlicz spaces are improved with respect to the fractional moduli of smoothness. An improved Marchaud ... -
Approximation by (C,1) and Abel-Poisson means of Fourier series on hexagonal domains
(Element, 2013)The approximation problems by Cesaro (C, 1) means and by Abel-Poisson means of Fourier series on hexagonal domains are studied. The estimates for the rate of convergence of these means are obtained for functions in Lipschitz ... -
Relationships between fixed points and eigenvectors in the group GL (2, ℝ)
(Springer International Publishing Ag, 2013)PSL(2, R) is the most frequently studied subgroup of the Mobius transformations. By adding anti-automorphisms G' = {a'z + b'/c'z + d' : a', b', c', d' is an element of R, a'd' - b'c' = -1} to the group PSL(2, R), the ... -
A new monoid construction under crossed products proceedings of the international congress in honour of professor Hari M. Srivastava
(Springeropen, 2013)In this paper we define a new monoid construction under crossed products for given monoids. We also present a generating set and a relator set for this product. Finally, we give the necessary and sufficient conditions for ... -
Generalized M*-simple groups
(Rocky Mt Math Consortium, 2013)Let X be a compact bordered Klein surface of algebraic genus p >= 2, and let G = Gamma*/Lambda be a group of automorphisms of X where Gamma* is an NEC group and Lambda is a bordered surface group. If the order of G is 4q/(q ... -
Some properties of the generalized Fibonacci and Lucas sequences related to the extended Hecke groups
(Springer, 2013)In this paper, we define a sequence, which is a generalized version of the Lucas sequence, similar to the generalized Fibonacci sequence given in Koruo. glu and, Sahin in Turk. J. Math. 2009, doi:10.3906/mat-0902-33. Also, ... -
On the images of ellipses under similarities
(Ovidius Univ Press, 2013)We consider ellipses corresponding to any norm function on the complex plane and determine their images under the similarities which are special Mobius transformations. -
Squares of congruence subgroups of the extended modular group
(Univ Miskolc Inst Math, 2013)In this paper, we generalize some results related to the congruence subgroups of modular group Gamma, given in [7] and [6] by Kiming, Schutt, and Verrill, to the extended modular group Pi. -
Chen inequalities for submanifolds of a Riemannian manifold of nearly quasi-constant curvature
(Kossuth Lajos Tudomanyegyetem, 2013)The object of the present paper is to study Chen first inequality and k-Ricci curvatures for submanifolds of a Riemannian manifold of nearly quasi-constant curvature. -
On starlike functions connected with k-fibonacci numbers
(Springer, 2015)We present a new subclass SLk of starlike functions which is related to a shell-like curve. The coefficients of such functions are connected with k-Fibonacci numbers F-k,F- n defined recurrently by F-k,F- 0 = 0, F-k,F- 1 ... -
Digital variable sampling integral control of infinite-dimensional systems
(2000)In this paper we present sampled-data low-gain I-control algorithms for infinite-dimensional systems in which the sampling period is not constant. The system is assumed to be exponentially stable with invertible steady ... -
On some class of hypersurfaces in double-struck E signn+1 satisfying Chen's equality
(2002)In this paper we study pseudosymmetry type hypersurfaces in the Euclidean space n+1 satisfying B. Y. Chen's equality. -
Generalizations of Fibonacci and Lucas sequences
(2002)In this paper, we consider the Hecke groups H(√q), q ≥ 5 prime number, and we find an interesting number sequence which is denoted by dn. For q = 5, we get d2n = L2n+1 and d2n+1 = √5F2n+2 where L2n+1 is (2n + 1)th Lucas ...