Güncel Gönderiler: Matematik Bölümü
Toplam kayıt 544, listelenen: 381-400
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Generalized Sasakian space forms with semi-symmetric non-metric connections
(Estonian Academy Publishers, 2011)We introduce generalized Sasakian space forms with semi-symmetric non-metric connections. We show the existence of a generalized Sasakian space form with a semi-symmetric non-metric connection and give some examples by ... -
On converse theorems of trigonometric approximation in weighted variable exponent lebesgue spaces
(Duke Univ Press, 2011)In this work we prove improved converse theorems of trigonometric approximation in variable exponent Lebesgue spaces with some Mucken-houpt weights. -
Doubly warped product submanifolds of (kappa, mu)-contact metric manifolds
(Polish Acad Sciences Inst Mathematics, 2011)We establish sharp inequalities for C-totally real doubly warped product submanifolds in (kappa, mu)-contact space forms and in non-Sasakian (kappa, mu)-contact metric manifolds. -
Polynomial approximation of functions in weighted Lebesgue and Smirnov spaces with nonstandard growth
(Heldermann Verlag, 2011)This work deals with basic approximation problems such as direct, inverse and simultaneous theorems of trigonometric approximation of functions of weighted Lebesgue spaces with a variable exponent on weights satisfying a ... -
B. Y. Chen inequalities for submanifolds of a riemannian manifold of quasi-constant curvature
(Scientific Technical Research Council Turkey-Tubitak, 2011)In this paper, we prove B. Y. Chen inequalities for submanifolds of a Riemannian manifold of quasi-constant curvature, i.e., relations between the mean curvature, scalar and sectional curvatures, Ricci curvatures and the ... -
The refined direct and converse inequalities of trigonometric approximation in weighted variable exponent Lebesgue spaces
(Walter De Gruyter GMBH, 2011)Refined direct and converse theorems of trigonometric approximation are proved in the variable exponent Lebesgue spaces with weights satisfying some Mucken-houpt A(p)-condition. As a consequence, the refined versions of ... -
Chen inequalities for submanifolds of complex space forms and sasakian space forms endowed with semi-symmetric metric connections
(Rocky Mt Math Consortium, 2011)In this paper we prove Chen inequalities for submanifolds of complex space forms and, respectively, Sasakian space forms, endowed with semi-symmetric metric connections, i.e., relations between the mean curvature associated ... -
On the solution of the monge-ampere equation z(xx)z(yy)-z(xy)(2)=f(x, y) with quadratic right side
(B Verkin Inst Low Temperature Physics & Engineering, 2011)For the Monge-Ampere equation Z(xx)Z(yy) - Z(xy)(2) = b(20)(x2)+b(11).xy+b(02y)(2)+ b(00) we consider the question on the existence of a solution Z(x, y) in the class of polynomials such that Z = Z(x, y) is a graph of a ... -
The minimal polynomials of 2cos(pi/2k) over the rationals
(Amer Inst Physics, 2011)The number lambda(q) = 2cos pi/q, q is an element of N, q >= 3, appears in the study of Hecke groups which are Fuchsian groups of the first kind, and in the study of regular polyhedra. Here we obtained the minimal polynomial ... -
Conjugacy for free groups under split extensions
(Amer Inst Physics, 2011)At the present paper we show that conjugacy is preserved and reflected by the natural homomorphism defined from a semigroup S to a group G, where G defines split extensions of some free groups. The main idea in the proofs ... -
The efficiency of the semi-direct products of free abelian monoid with rank n by the ınfinite cyclic monoid
(Amer Inst Physics, 2011)In this paper we give necessary and sufficient conditions for the efficiency of the semi-direct product of free abelian monoid with rank n by the infinite cyclic monoid. -
Commutator subgroups of the power subgroups of some Hecke groups
(Springer, 2011)Let qa parts per thousand yen3 be a prime and let H(lambda (q) ) be the Hecke group associated to q. Let m be a positive integer and H (m) (lambda (q) ) be the mth power subgroup of H(lambda (q) ). In this work, we study ... -
Commutator subgroups of the power subgroups of Hecke groups H(lambda(q)) II
(Elsevier France-Editions Scientifiques Medicales Elsevier, 2011)Let q >= 3 be an odd number and let H(lambda(q)) be the Hecke group associated to q. Let m be a positive integer and let H-m(lambda(q)) be the m-th power subgroup of H(lambda(q)). In this work, we study the commutator ... -
Multistage adomian decomposition method for solving nlp problems over a nonlinear fractional dynamical system
(Asme-Amer Soc Mechanical Eng, 2011)This paper deals with implementation of the multistage Adomian decomposition method (MADM) to solve a class of nonlinear programming (NLP) problems, which are reformulated with a nonlinear system of fractional differential ... -
Simultaneous and converse approximation theorems in weighted lebesgue spaces
(Element, 2011)In this paper we deal with the simultaneous and converse approximation by trigonometric polynomials of the functions in the Lebesgue spaces with weights satisfying so called Muckenhoupt's A(p) condition. -
Inequalities for one sided approximation in orlicz spaces
(Hacettepe Univ., 2011)In the present article some inequalities of trigonometric approximation are proved in Orlicz spaces generated by a quasiconvex Young function. Also, the main one-sided approximation problems are investigated. -
Warped products with a semi-symmetric non-metric connection
(Springer Heidelberg, 2011)The aim of this paper is to study warped product manifolds endowed with a semi-symmetric non-metric connection. We find relations between the Levi-Civita connection and the semi-symmetric non-metric connection of the warped ... -
Tensor product surfaces with pointwise 1-type gauss map
(Korean Mathematical Soc, 2011)Tensor product immersions of a given Riemannian manifold was initiated by B.-Y. Chen. In the present article we study the tensor product surfaces of two Euclidean plane curves. We show that a tensor product surface M of a ... -
Trigonometric approximation of functions in generalized lebesgue spaces with variable exponent
(Springer, 2011)We investigate the approximation properties of the trigonometric system in L-2 pi(p(.)): We consider the moduli of smoothness of fractional order and obtain direct and inverse approximation theorems together with a ... -
A new example of strongly pi-inverse monoids
(Hacettepe Univ., 2011)In [1], Ate defined the semidirect product version of the Schutzenberger product for any two monoids, and examined its regularity. Since this is a new product and there are so many algebraic properties that need to be ...
