Güncel Gönderiler: Matematik-Makale Koleksiyonu
Toplam kayıt 499, listelenen: 281-300
-
Coordinate finite type rotational surfaces in euclidean spaces
(Univ Nis, 2014)Submanifolds of coordinate finite-type were introduced in [10]. A submanifold of a Euclidean space is called a coordinate finite-type submanifold if its coordinate functions are eigenfunctions of Delta. In the present study ... -
Optimal control of a linear time-invariant space-time fractional diffusion process
(Sage Publications Ltd, 2014)This paper presents a formulation and numerical solutions of an optimal control problem of a linear time-invariant space-time fractional diffusion equation. The main aim of this formulation is minimization of a performance ... -
Two-sided crossed products of groups
(Univ Nis, 2016)In this paper, we first define a new version of the crossed product of groups under the name of two-sided crossed product. Then we present a generating and relator sets for this new product over cyclic groups. In a separate ... -
Simultaneous approximation of functions in Orlicz spaces with Muckenhoupt weights
(Taylor & Francis Ltd, 2016)It is proved that theorems on simultaneous trigonometric approximation of functions given in the weighted Orlicz spaces L-phi,L-omega**, with a generating Young function phi that might be non-convex, are held. We mainly ... -
A note on the grobner-shirshov bases over ad-hoc extensions of groups
(Univ Nis, 2016)The main goal of this paper is to obtain (non-commutative) Grobner-Shirshov bases for monoid presentations of the knit product of cyclic groups and the iterated semidirect product of free groups. Each of the results here ... -
Trigonometric approximation in weighted orlicz spaces
(Inst Mathematics & Mechanics, 2016)In the present article, we prove some trigonometric approximation theorems in weighted Orlicz spaces, having generating Young functions not necessary to be convex. -
Generalized M*-groups
(World Scientific Publ Co Pte Ltd, 2006)A compact bordered Klein surface of algebraic genus p >= 2 has at most 12(p - 1) automorphisms. Automorphism groups which attain this bound are called M*-groups. In this paper, firstly, we define generalized M*-groups. ... -
On some special classes of Kenmotsu manifolds
(Academic Publication Council, 2006)We investigate the classes of Kenmotsu manifolds which satisfy the condition of being eta-Einstein, having eta-parallel Ricci tensor, R(xi, X) (.) Z = 0, R(xi, X) (.) R = 0, Z(xi, X) (.) Z = 0, Z(xi, X) (.) R = 0, Z(xi, ... -
On legendre curves in alpha-sasakian manifolds
(Malaysian Mathematical Sciences Soc, 2008)The torsion of a Legendre curve of an alpha-Sasakian manifold is obtained. Necessary and sufficient conditions for Legendre curves having parallel mean curvature vector, having proper mean curvature vector, being harmonic ... -
On N(k)-quasi Einstein manifolds satisfying certain conditions
(Balkan Soc Geometers, 2008)This paper deals with N(k)-quasi Einstein manifolds satisfying the conditions R(xi ,X)center dot C = 0 and R(xi,X)center dot(C) over tilde = 0, where C and (C) over tilde denote the Weyl conformal curvature tensor and the ... -
A decomposition of some types of mixed soft continuity in soft topological spaces
(Univ Nis, 2016)In this paper, we study the concept of soft sets which is introduced by Molodtsov [5] and the notion of soft continuity is introduced by Zorlutuna et al. [8]. We give the definition of (tau(1), tau(2)) -semi open soft ... -
A presentation and some finiteness conditions for a new version of the Schiitzenberger product of monoids
(Scientific Technical Research Council Turkey-Tubitak, 2016)In this paper we first define a new version of the Schutzenberger product for any two monoids A and B, and then, by defining a generating and relator set, we present some finite and infinite consequences of the main result. ... -
Riemannian manifolds with a semi-symmetric metric connection satisfying some semisymmetry conditions
(Estonian Academy Publishers, 2008)We study Riemannian manifolds M admitting a semi-symmetric metric connection ($) over tilde such that the vector field U is a parallel unit vector field with respect to the Levi-Civita connection del. We prove that ($) ... -
Separability and efficiency under standard wreath product in terms of Cayley graphs
(Rocky Mt Math Consortium, 2008)In this paper we are mainly interested in separability and efficiency under the standard wreath product. To do that we will first obtain a presentation, say P(G), for the standard wreath product in terms of Cayley graphs. ... -
Trace classes and fixed points for the extended modular group (Gamma)over-bar
(Scientific Technical Research Council Turkey-Tubitak, 2008)The extended modular group (Gamma) over bar = PGL(2, Z) is the group obtained by adding the reflection R(z) = 1/(z) over bar to the generators of the modular group F = PSL(2, Z). In this paper, we find the trace classes ... -
Approximation in weighted generalized grand lebesgue spaces
(Ars Polona-Ruch, 2016)The direct and inverse problems of approximation theory in the subspace of weighted generalized grand Lebesgue spaces of 2 pi-periodic functions with the weights satisfying Muckenhoupt's condition are investigated. Appropriate ... -
Generalized pell sequences in some principal congruence subgroups of the hecke groups
(Editura Acad Romane, 2016)In this paper, we consider the Hecke groups H(root m) for m = 1, 2 and 3. Firstly, we give the generators of the principal congruence subgroups H-2(root m) of H(root m), respectively. Then, using some of these generators, ... -
On contact metric hypersurfaces in a real space form
(Academic Publication Council, 2007)For a (2n + 1)-dimensional N(k)-contact metric hypersurface in a real space form (M) over tilde (c), some main results are obtained as follows: (1) if k - c > 0 then M is totally umbilical, and consequently, either M is a ... -
Improved inverse theorems in weighted lebesgue and smirnov spaces
(Belgian Mathematical Soc Triomphe, 2007)The improvement of the inverse estimation of approximation theory by trigonometric polynomials in the weighted Lebesgue spaces was obtained and its application in the weighted Smirnov spaces was considered. -
Approximation properties of Julia polynomials
(Springer Heidelberg, 2007)Let G be a finite simply connected domain in the complex plane C, bounded by a rectifiable Jordan curve L, and let w = phi(0) (z) be the Riemann conformal mapping of G onto D(0, r (0)) := {w : vertical bar w vertical bar ...