Matematik Bölümü: Recent submissions
Now showing items 421-440 of 548
-
Approximation theorems in weighted lorentz spaces
(North Univ Baia Mare, 2010)In this paper we deal with the converse and simultaneous approximation problems of functions possessing derivatives of positive orders by trigonometric polynomials in the weighted Lorentz spaces with weights satisfying the ... -
A dynamic system approach to quadratic programming problems with penalty method
(Malaysian Mathematical Sciences Soc, 2010)In this work, we propose a dynamical system (state space) model approach to find a unique minimum of quadratic programming (QP) problem,;, with equality constrained. The unique minimum of the optimization problem is also ... -
Simultaneous and converse approximation theorems in weighted orlicz spaces
(Belgian Mathematical Soc Triomphe, 2010)In the present work, we investigate the simultaneous and converse approximation by trigonometric polynomials of the functions in the Orlicz spaces with weights satisfying so called Muckenhoupt's A(p) condition. -
On the two-square theorem and the modular group
(Charles Babbage Res Ctr, 2010)Given a positive integer n such that -1 is a quadratic residue mod n, we give an algorithm that computes the integers u and v which satisfy the equation n = u(2) + v(2). To do this we use the group structure of the Modular ... -
Chen inequalities for submanifolds of a locally conformal almost cosymplectic manifold with a semi-symmetric metric connection
(Ovidius Univ Press, 2010)In this paper we prove Chen inequalities for submanifolds of a locally conformal almost cosymplectic manifold N(2m+1)(c) of constant phi-sectional curvature c endowed with a semi-symmetric metric connection, i.e., relations ... -
Second order parallel tensors on (k, mu)-contact metric manifolds
(Ovidius Univ Press, 2010)The object of the present paper is to study the symmetric and skew-symmetric properties of a second order parallel tensor in a (k, mu)-contact metric manifold. -
Ellipses and harmonic mobius transformations
(Ovidius Univ Press, 2010)Harmonic Mobius transformations are the generalization of Mobius transformations to harmonic mappings. Their basic geometric property is that they take circles to ellipses. In this paper, we determine the images of ellipses ... -
On generalized M* - groups
(Ovidius Unıv Press, 2010)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 a non-euclidian chrystalographic group and Lambda is a bordered surface group. ... -
Two-weight estimates for fourier operators and bernstein inequality
(Akademiai Kiado Zrt, 2010)The norm estimation problem for Fourier operators acting from L-w(p)(T) to L-v(q)(T) where 1 < p <= q < infinity was investigated. These results has been generalized to the two-dimensional case and applied to obtain ... -
On the means of fourier integrals and bernstein inequality in the two-weighted setting
(Springer, 2010)The norm estimation problem for Cesaro and Abel-Poisson operators acting from L-w(p)(R) to L-v(q)(R) where 1 < p <= q < infinity was investigated. These results were generalized to the multidimensional case and applied to ... -
Doubly warped product submanifolds of a riemannian manifold of quasi-constant curvature
(Universitatii Al.I.Cuza din Iasi, 2015)We establish a sharp inequality for a doubly warped product submanifold in a Riemannian manifold of quasi-constant curvature. -
Chen inequalities for submanifolds of real space forms with a semi-symmetric metric connection
(Mathematical Soc Rep China, 2010)In this paper we prove Chen inequalities for submanifolds of real space forms endowed with a semi-symmetric metric connection, i.e, relations between the mean curvature associated with the semi-symmetric metric connection, ... -
On submanifolds of a Riemannian manifold with a semi-symmetric non-metric connection
(Academıc Publıcatıon Councıl, 2010)Under investigation were the submanifolds of a Riemannian manifold with a semi-symmetric non-metric connection. We have proved that the induced connection is also a semi-symmetric non-metric connection. The totaly geodesicness ... -
Pseudoparallel anti-invariant submanifolds of kenmotsu manifolds
(Hacettepe Unıv, 2010)We consider an anti-invariant, minimal, pseudoparallel and Ricci-generalized pseudoparallel submanifold M of a Kenmotsu space form (M) over tilde (c), for which xi is tangent to M. -
Cr-submanifolds of a lorentzian para-sasakian manifold with a semi-symmetric metric connection
(Hacettepe Unıv, 2010)We study CR-submanifolds of a Lorentzian para-Sasakian manifold endowed with a semi-symmetric metric connection. Moreover, we obtain integrability conditions of the distributions on CR-submanifolds. -
On phi-quasiconformally symmetric sasakian manifolds
(Elsevier Science Bv, 2009)We study locally and globally phi-quasicon formally symmetric Sasakian manifolds. We show that a globally phi-quasiconformally symmetric Sasakian manifold is globally phi-symmetric. Some observations for a 3-dimensional ... -
Digital variable sampling integral control of infinite dimensional systems subject to input nonlinearity
(IEEE-Inst Electrical Electronics Engineers Inc, 2009)In this technical note we present a novel sampled-data low-gain I-control algorithm for infinite-dimensional systems in the presence of input nonlinearity. The system is assumed to be exponentially stable with invertible ... -
On invariant submanifolds of lorentzian para-sasakian manifolds
(King Fahd Univ Petroleum Minerals, 2009)We consider semiparallel and 2-semiparallel invariant submanifolds of Lorentzian para-Sasakian manifolds. We show that these submanifolds are totally geodesic. We also consider invariant submanifolds of Lorentzian para-Sasakian ... -
Hypersurfaces of an almost r-paracontact riemannian manifold with a semi-symmetric non-metric connection
(Birkhauser Verlag Ag, 2009)We define a semi-symmetric non-metric connection in an almost r-paracontact Riemannian manifold and consider invariant, non-invariant and anti-invariant hypersurfaces, respectively, of almost r-paracontact Riemannian ... -
Analysis of an axis-symmetric fractional diffusion-wave problem
(IOP Publishing Ltd, 2009)This paper presents an axis-symmetric fractional diffusion-wave problem which is considered in polar coordinates. The dynamic characteristics of the system are described with a partial fractional differential equation in ...
