Matematik-Makale Koleksiyonu: Recent submissions
Now showing items 441-460 of 503
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On approximation of hexagonal fourier series
(Inst Math & Mechanics Azerbaijan, 2018)Let the function f belong to the Holder class H-alpha(Omega) over bar , 0 < alpha <= 1, where Omega is the spectral set of the hexagonal lattice in the Euclidean plane : Also, let p = (p(n)) and q = (q(n)) be two sequences ... -
Wardowski type contractions and the fixed-circle problem on s-metric spaces
(Hindawi Ltd, 2018)In this paper, we present new fixed-circle theorems for self-mappings on an S-metric space using some Wardowski type contractions, psi-contractive, and weakly psi-contractive self-mappings. The common property in all of ... -
On tzitzeica curves in euclidean 3-space e-3
(Univ Nis, 2018)In this study, we consider Tzitzeica curves (Tz-curves) in a Euclidean 3-space E-3. We characterize such curves according to their curvatures. We show that there is no Tz-curve with constant curvatures (W-curves). We ... -
Convolution and Jackson inequalities in musielak-orlicz spaces
(Scientific Technical Research Council Turkey-Tubitak, 2018)In the present work we prove some direct and inverse theorems for approximation by trigonometric polynomials in Musielak-Orlicz spaces. Furthermore, we get a constructive characterization of the Lipschitz classes in these spaces. -
Averaged modulus of smoothness and two-sided monotone approximation in Orlicz spaces
(Hacettepe Univ, 2018)The paper deals with basic properties of averaged modulus of smoothness in Orlicz spaces L-phi*. Some direct and inverse two-sided approximation problems in L-phi* are proved. In the last section, some inequalities concerning ... -
Ellipses and similarity transformations with norm functions
(Scientific Technical Research Council Turkey-TUBITAK, 2018)In this paper, we deal with a conjecture related to the images of ellipses (resp. circles) under similarities that are the special Mobius transformations. We consider ellipses (resp. circles) corresponding to any norm ... -
Inequalities for submanifolds of Sasaki-like statistical manifolds
(Scientific Technical Research Council Turkey-TUBITAK, 2018)We consider statistical submanifolds in Sasaki-like statistical manifolds. We give some examples of invariant and antiinvariant submanifolds of Sasaki-like statistical manifolds. We prove Chen-like inequality involving ... -
Commutator subgroups of generalized hecke and extended generalized hecke groups
(Ovidius Univ Press, 2018)Let p and q be integers such that 2 <= p <= q, p + q > 4 and let H-p,H-q be the generalized Hecke group associated to p and q. The generalized Hecke group H-p,H-q is generated by X (z) = -(z - lambda(p))(-1) and Y(z) = -(z ... -
On slant curves in s-manifolds
(Korean Mathematical Soc, 2018)In this paper, we consider biharmonic slant curves in S-space forms. We obtain a main theorem, which gives us four different cases to find curvature conditions for these curves. We also give examples of slant curves in R2n+s(-3s). -
Numerical inverse laplace homotopy technique for fractional heat equations
(Vinca Inst Nuclear Sci, 2018)In this paper, we have aimed the numerical inverse Laplace homotopy technique for solving some interesting 1-D time fractional heat equations. This method is based on the Laplace homotopy perturbation method, which is ... -
A new extension of the m-b-metric spaces
(Univ Prishtines, 2018)In this paper, we present a new notion which is called an extended Mb-metric space as a generalization of an M-b-metric space. We investigate some basic and topological properties of this new space. Furthermore, an extended ... -
Simultaneous approximation in lebesgue space with variable exponent
(Inst Mathematics & Mechanics, 2018)In this paper we deal with the simultaneous approximations by trigonometric polynomials of 27 periodic functions in the variable exponent Lebesgue spaces. In terms of the higher moduli of smoothness the direct and inverse ... -
A different approach to the european option pricing model with new fractional operator
(Edp Sciences S A, 2018)In this work, we have derived an approximate solution of the fractional Black-Scholes models using an iterative method. The fractional differentiation operator used in this paper is the well-known conformable derivative. ... -
Some remarks on the zeros of tribonacci polynomials
(Etamaths Publ, 2018)In this paper, the zeros of Tribonacci polynomials are studied. The bound containing the zeros of Tribonacci polynomials has been numerically examined with comparisons. On the other hand, a new algorithm is given so that ... -
Approximation by matrix transforms in weighted lebesgue spaces with variable exponent
(Springer Basel Ag, 2018)In this work the approximation properties of the matrix transforms of functions in the weighted variable exponent Lebesgue spaces are investigated. -
Gadjieva's conjecture, k-functionals, and some applications in weighted lebesgue spaces
(Scientific Technical Research Council Turkey-Tubitak, 2018)We prove that Gadjieva's conjecture holds true as stated in her PhD thesis. The positive solution of this conjecture allows us to obtain improved versions of the Jackson-Stechkin type inequalities obtained in her thesis ... -
Multiplier and approximation theorems in smirnov classes with variable exponent
(Scientific Technical Research Council Turkey-Tubitak, 2018)Let G subset of C be a bounded Jordan domain with a rectifiable Dini-smooth boundary F and let G(-) := ext Gamma. In terms of the higher order modulus of smoothness the direct and inverse problems of approximation theory ... -
Grobner-shirshov basis for the singular part of the brauer semigroup
(Scientific Technical Research Council Turkey-Tubitak, 2018)In this paper, we obtain a Grobner-Shirshov (noncommutative Grobner) basis for the singular part of the Brauer semigroup. It gives an algorithm for getting normal forms and hence an algorithm for solving the word problem ... -
Some results on hecke and extended hecke groups
(Scientific Technical Research Council Turkey-Tubitak, 2018)Let q >= 3 be a prime number and let (H) over bar(lambda(q)) be the extended Hecke group associated with q. In this paper, we determine the presentation of the commutator subgroup (H (lambda(q))alpha)' of the normal subgroup ... -
Approximation of continuous functions by matrix means of hexagonal fourier series
(Springer Basel Ag, 2018)Some estimates for the degree of approximation by matrix means of hexagonal Fourier series of H-periodic continuous functions are obtained. The degree of approximation of H-periodic Holder continuous functions by these ...
